Get premium membership and access questions with answers, video lessons as well as revision papers.
Solution:
(x – 4)(x + 5).
= x(x + 5) -4(x + 5).
= x2 + 5x – 4x – 20.
= x2 + x - 20
vindori answered the question on April 1, 2018 at 14:19
- Combine these terms: 12a + 26b -4b – 16a(Solved)
Linking the like terms
Date posted: April 1, 2018. Answers (1)
- Which digit is greater than 4?
(a) 5,
(b) -5,
(c) -100
(d) -25.(Solved)
Simple maths, negative numbers and normal numbers
Date posted: April 1, 2018. Answers (1)
- What are the theoretical consequences of multicollinearity?(Solved)
What are the theoretical consequences of multicollinearity?
Date posted: March 26, 2018. Answers (1)
- The size of an interior angle of a regular polygon is 3x° while its exterior angle is (x-20)°. Find the number of sides of the...(Solved)
The size of an interior angle of a regular polygon is 3x° while its exterior angle is (x-20)°. Find the number of sides of the polygon
Date posted: March 17, 2018. Answers (1)
- Find the value of x in the following equation:
64^x+1 + 8^2x = 1040
(Solved)
Solving for x using the rules of indices
Date posted: March 16, 2018. Answers (1)
- A quantity P is partly constant and partly varies as the square of Q. When Q=2,P=40 and when Q=3, P=65. Determine the value of P...(Solved)
A quantity P is partly constant and partly varies as the square of Q. When Q=2,P=40 and when Q=3, P=65. Determine the value of P when Q=4.
Date posted: March 4, 2018. Answers (1)
- The distance light travels in one year is approximately 5,870,000,000,000 miles. The distance light travels in 100 years will be:(Solved)
The distance light travels in one year is approximately 5,870,000,000,000 miles. The distance light travels in 100 years will be:
Date posted: March 1, 2018. Answers (1)
- A piece of wire 40cm long is bent to form a right-angle whole hypotenuse is 17cm long.Find the length of each of the other two sides.(Solved)
A piece of wire 40 cm long is bent to form a right-angle whole hypotenuse is 17 cm long.Find the length of each of the other two sides.
Date posted: February 19, 2018. Answers (1)
- Determine the derivative y' given y=(x+2)(x+3)/(x+1)(x+2)(Solved)
Determine the derivative y' given y=(x+2)(x+3)/(x+1)(x+2)
Date posted: February 4, 2018. Answers (1)
- What is simple algorithm method?(Solved)
What is simple algorithm method?
Date posted: February 3, 2018. Answers (1)
- The bus fare per passenger (f) is partly constant and partly varies inversely proportional to the number (n) of passengers. The fare per passenger for...(Solved)
The bus fare per passenger (f) is partly constant and partly varies inversely proportional to the number (n) of passengers. The fare per passenger for 40 passengers is k240 and for 50 passengers is k200. calculate the fare per passenger when they are 100 passengers.
Date posted: January 29, 2018. Answers (1)
- What is the importance of oil palm to the Nigerian economy (Solved)
What is the importance of oil palm to the Nigerian economy
Date posted: January 21, 2018. Answers (1)
- Differentiate between quantitative and qualitative data(Solved)
Differentiate between quantitative and qualitative data.
Date posted: January 15, 2018. Answers (1)
- Give five methods of data presentation(Solved)
Give five methods of data presentation.
Date posted: January 15, 2018. Answers (1)
- What is a ratio as used in Mathematics?(Solved)
What is a ratio as used in Mathematics?
Date posted: January 12, 2018. Answers (1)
- What does Pythogoras theorem state?(Solved)
What does Pythogras theorem state?
Date posted: January 12, 2018. Answers (1)
- Differentiate between scalar and vector quantities.(Solved)
Differentiate between scalar and vector quantities
Date posted: January 12, 2018. Answers (1)
- Five men each working 10 hours a day take two days to cultivate one acre of land.How long will two men each working six hours a...(Solved)
Five men each working 10 hours a day take two days to cultivate one acre of land.How long will two men each working six hours a day take to cultivate three acres of land
Date posted: December 28, 2017. Answers (1)
- Solve $x^2 -15x + 3 = 0$, giving your answer to 3 significant figures(Solved)
Solve $x^2 - 15x + 3 = 0$, giving your answer to 3 significant figures.
Date posted: December 20, 2017. Answers (1)
- Solve $x^2 = 16$(Solved)
Solve $x^2 = 16$
Date posted: December 20, 2017. Answers (1)