Question

Find the product $24x^2(1-2x)\text{and evaluate its value for}x=3.$

Answer 1

$24x^2(1-2x)=24x^2\times 1+24x^2\times (-2x)=24x^2+(-48x^{2+1})=24x^2-48x^{3}Ifx=3,then=24(3{)}^2-48(3{)}^3=24\times 9-48\times 27=216-1296=-1080$