Question

factorise the following expression
(a) 3x^2+6x-45​

Answer 1

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Answer 2

Answer:

$3 {x}^{2} + 6x - 45$

$= 3 {x}^{2} + (15 - 9)x - 45$

$= 3 {x}^{2} + 15x - 9x - 45$

$= 3x(x + 5) - 9(x + 5)$

$= (x + 2)(3x - 9)$

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