Impara online a risolvere i problemi di passo dopo passo. Solve the quadratic equation -4x^2+7x+8=0. Applicare la formula: ax^2+bx+c=a\left(x^2+\frac{b}{a}x+\frac{c}{a}\right), dove a=-4, b=7 e c=8. Applicare la formula: a\left(x^2+b+c\right)=a\left(x^2+b+c+\left(\frac{coef\left(b\right)}{2}\right)^2-\left(\frac{coef\left(b\right)}{2}\right)^2\right), dove a=-4, b=-\frac{7}{4}x e c=-2. Applicare la formula: a\left(x^2+b+c+f+g\right)=a\left(\left(x+\sqrt{f}sign\left(b\right)\right)^2+c+g\right), dove a=-4, b=-\frac{7}{4}x, c=-2, x^2+b=x^2-\frac{7}{4}x-2+\frac{49}{64}-\frac{49}{64}, f=\frac{49}{64} e g=-\frac{49}{64}. Applicare la formula: \frac{a}{b}+c=\frac{a+cb}{b}, dove a/b+c=\left(x- \frac{7}{8}\right)^2-2-\frac{49}{64}, a=-49, b=64, c=-2 e a/b=-\frac{49}{64}.

Solve the quadratic equation -4x^2+7x+8=0