Impara online a risolvere i problemi di passo dopo passo. 7sin(x)^2-14sin(x)+2=-5. Applicare la formula: ax^2+bx+c=a\left(x^2+\frac{b}{a}x+\frac{c}{a}\right), dove a=7, b=-14, c=2 e x=\sin\left(x\right). 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=7, b=-2\sin\left(x\right), c=\frac{2}{7} e x=\sin\left(x\right). 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=7, b=-2\sin\left(x\right), c=\frac{2}{7}, x^2+b=\sin\left(x\right)^2-2\sin\left(x\right)+\frac{2}{7}+1-1, f=1, g=-1, x=\sin\left(x\right) e x^2=\sin\left(x\right)^2. Applicare la formula: \frac{a}{b}+c=\frac{a+cb}{b}, dove a/b+c=\left(\sin\left(x\right)-1\right)^2+\frac{2}{7}-1, a=2, b=7, c=-1 e a/b=\frac{2}{7}.