Question

a)(9x^ 2 )-(-2x)=-18x^ 3 ( ) me ajudem!!!!!!!!!!!​

Answer 1

Resposta:

$(9x^ 2 )-(-2x)=-18x^ 3 \\\\9x^2+2x=-18x^3\\\\-18x^3=9x^2+2x\\\\-18x^3-2x=9x^2+2x-2x\\\\-18x^3-2x=9x^2\\\\-18x^3-2x-9x^2=9x^2-9x^2\\\\-18x^3-2x-9x^2=0\\\\-x\left(18x^2+9x+2\right)=0\\\\x=0\quad \mathrm{ou}\quad \:18x^2+9x+2=0\\\\x=0\\\\\:x=-\frac{1}{4}+i\frac{\sqrt{7}}{12}\\\\\:x=-\frac{1}{4}-i\frac{\sqrt{7}}{12}$