x (x+9) = 4x9
x2 + 9x – 36 = 0
(x2 – 3x) + (12x -36=0)
x(x-3) + 12(x-3) =0
(x+12) (x-3) = 0
x -3 = 0
x = 3 only
Kavungya answered the question on June 19, 2019 at 13:57
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