Impara online a risolvere i problemi di passo dopo passo. Solve the quadratic equation x^2+10x=-21. Applicare la formula: x^2+bx=x^2+bx+\left(\frac{b}{2}\right)^2-\left(\frac{b}{2}\right)^2, dove b=10, bx=10x e x^2+bx=x^2+10x. Applicare la formula: x^2+bx+f+g=\left(x+\sqrt{f}sign\left(b\right)\right)^2+g, dove b=10, bx=10x, f=25, g=-25 e x^2+bx=x^2+10x+25-25. Applicare la formula: x+a=b\to x+a-a=b-a, dove a=-25, b=-21, x+a=b=\left(x+5\right)^2-25=-21, x=\left(x+5\right)^2 e x+a=\left(x+5\right)^2-25. Applicare la formula: x+a+c=b+f\to x=b-a, dove a=-25, b=-21, c=25, f=25 e x=\left(x+5\right)^2.

Solve the quadratic equation x^2+10x=-21