Question

factorise 15+x-2x^2​

Answer 1

Answer:

$- {2x}^{2} + x + 15 = 0$

$- {2x}^{2} + 6x - 5x + 15 = 0$

$- 2x(x - 3) - 5(x - 3) = 0$

$( x - 3)( - 2x - 5) = 0$

$(x - 3) = 0 ( - 2x - 5) = 0$

$x = 3 \: or \: x = - \frac{5}{2}$

Step-by-step explanation:

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