Question

factorise x²​+ 11x+18​

Answer 1

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X = -9 or X = -2

SOLUTION :-

${x}^{2} + 11x + 18 \\ {x}^{2} + 9x + 2x + 18 \\ x(x + 9) + 2(x + 9) \\ (x + 9)(x + 2)$

therefore,

$x = - 9 \: or \: x = - 2$

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Answer 2

Answer:

We can factorise this by middle-term splitting.

$x^2 + 11x + 18$

$= x^2 + 9x+2x + 18$

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

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