Impara online a risolvere i problemi di disuguaglianze passo dopo passo. Solve the inequality x^2-21x+20<0. Applicare la formula: x+a+b<c=x+b<c-a, dove a=20, b=-21x, c=0 e x=x^2. Applicare la formula: a+b=a+b, dove a=0, b=-20 e a+b=0-20. Applicare la formula: x^2+bx=x^2+bx+\left(\frac{b}{2}\right)^2-\left(\frac{b}{2}\right)^2, dove b=-21, bx=-21x e x^2+bx=x^2-21x. Applicare la formula: x^2+bx+f+g=\left(x+\sqrt{f}sign\left(b\right)\right)^2+g, dove b=-21, bx=-21x, f=\frac{441}{4}, g=- \frac{441}{4} e x^2+bx=x^2-21x+\frac{441}{4}- \frac{441}{4}.

Solve the inequality x^2-21x+20<0