Question

Slove equation by factorisation method
5x^2+8x-21=0

Answer 1

Answer:

Step-by-step explanation:

$5x^{2} +8x-21=0$

$5x^{2} +15x-7x-21=0$

$5x(x+3)-7(x+3)=0$

$(x+3)(5x-7)$