Question

Factorise x2 -20x + 36

Answer 1

x^2-2x-18x+36

x(x-2)-18(x-2)

(x-2)(x-18)

x=2,18

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Answer 2

x^2 - 20x + 36 = 0

x^2 - 18x - 2x + 36 = 0

x(x - 18) - 2 ( x - 18 ) = 0

(x - 2)(x - 18) = 0

x = -2 or x = -18

Hope it helps !