展开 (u-3)^2

解答

展开

(u - 3)^{2}

u^{2} - 6 u + 9

求解步骤

(u - 3)^{2}

使用完全平方公式:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(u - 3)^{2} = u^{2} - 2 u \cdot 3 + 3^{2}

= u^{2} - 2 u \cdot 3 + 3^{2}

化简

u^{2} - 2 u \cdot 3 + 3^{2} : u^{2} - 6 u + 9

= u^{2} - 6 u + 9

j o in \frac{9 π}{2} - 2 π

s im pl i f y \frac{\frac{6 x + 12}{x ^{8}}}{\frac{x + 2}{x ^{3}}}

s im pl i f y \frac{9 !}{4 ! \cdot 5 !}

s im pl i f y 2125 - 380

\frac{9}{2} \div \frac{3}{4}