Question

3) 2x² + 7x - 30

AC method

Answer 1

Hello

a=2, b=7, c= -30

ac=-60

-60= 12*(-5)

We can see that 12*(-5)=ac and 12-5=b=7

So

$2x^2+7x-30=2x&2+12x-5x-30=2x(x+6)-5(x+6)=(x+6)(2x-5)$

Thanks