Impara online a risolvere i problemi di passo dopo passo. 4n^2-18n+9. Applicare la formula: ax^2+bx+c=a\left(x^2+\frac{b}{a}x+\frac{c}{a}\right), dove a=4, b=-18, c=9 e x=n. 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{9}{2}n, c=\frac{9}{4} e x=n. 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{9}{2}n, c=\frac{9}{4}, x^2+b=n^2-\frac{9}{2}n+\frac{9}{4}+\frac{81}{16}-\frac{81}{16}, f=\frac{81}{16}, g=-\frac{81}{16}, x=n e x^2=n^2. Applicare la formula: \frac{a}{b}c=\frac{ca}{b}, dove a=9, b=4, c=-1, a/b=\frac{9}{4} e ca/b=- \frac{9}{4}.