Question

factorise.x^2+7x-18​

Answer 1

Answer:

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${x }^{2} + 7x - 18$

$x {}^{2} + 9x - 2x - 18$

$x(x + 9) - 2(x + 9) = 0$

$(x - 2)(x + 9) = 0$

$x = 2.x = - 9$