展开 (m-n^2)(am-,-3)

解答

展开

(m - n^{2}) (am -, - 3)

mma - m, - 3 m - m n^{2} a + n^{2}, 3 n^{2}

求解步骤

(m - n^{2}) (am -, - 3)

= (m - n^{2}) (ma -, - 3)

打开括号

= mam + m (-,) + m (- 3) + (- n^{2}) am + (- n^{2}) (-,) + (- n^{2}) (- 3)

使用加减运算法则

+ (- a) = - a, (- a) (- b) = ab

= mma - m, - 3 m - m n^{2} a + n^{2}, 3 n^{2}

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