Question

factorise 2xsquare+1x-45​

Answer 1

Step-by-step explanation:

$2x {}^{2} + x - 45 \\ = 2x {}^{2} + (10 - 9)x - 45 \\ = 2x {}^{2} + 10x - 9x - 45 \\ = 2x(x + 5) - 9(x + 5) \\ = (x + 5)(2x - 9)$