Question

factorise2x^2+3x-90




Plz qicckly factories this

Answer 1

Given,

=> 2x^2 + 3x - 90

In this type of questions at first we multiply imaginary first and last number then we split the middle term.

=> 2x^2 - 12x + 15x - 90

=> 2x(x-6) + 15 (x - 6)

=> (2x + 15) (x - 6)

Answer 2

$2 {x }^{2} + 3x - 90 \\ 2 {x}^{2} + 15x - 12x - 90 \\ x(2x + 15) - 6(2x + 15) \\ (2x + 15)(x - 6) \\ x = - \frac{15}{2} \: \: \: \: \: \: \: \: \: x = - 6$

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