Impara online a risolvere i problemi di passo dopo passo. Solve the quadratic equation x^2+18x=-40. Applicare la formula: x^2+bx=x^2+bx+\left(\frac{b}{2}\right)^2-\left(\frac{b}{2}\right)^2, dove b=18, bx=18x e x^2+bx=x^2+18x. Applicare la formula: x^2+bx+f+g=\left(x+\sqrt{f}sign\left(b\right)\right)^2+g, dove b=18, bx=18x, f=81, g=-81 e x^2+bx=x^2+18x+81-81. Applicare la formula: x+a=b\to x+a-a=b-a, dove a=-81, b=-40, x+a=b=\left(x+9\right)^2-81=-40, x=\left(x+9\right)^2 e x+a=\left(x+9\right)^2-81. Applicare la formula: x+a+c=b+f\to x=b-a, dove a=-81, b=-40, c=81, f=81 e x=\left(x+9\right)^2.

Solve the quadratic equation x^2+18x=-40