Question 404348
{{{6x^3 + 7x^2 - 24x - 28 =(6x^3 + 7x^2 )- (24x+ 28)=x^2(6x+7)-4(6x+7)=(6x+7)(x^2-4)}}}
You can use formula {{{a^2-b^2=(a-b)(a+b)}}}
{{{(6x+7)(x^2-4)=(6x+7)(x-2)(x+2)}}}