かっこの外に累乗の指数がある場合
(-x)2 = (-x)×(-x) = x2
(-2a3b)2
(-3x)2×(-2x4)
(23x2y)3×9xy2
解説動画 ≫
(-2a3b)2
= (-2a3b)×(-2a3b)
= -2×(-2) × a3b×a3b
= 4a6b2
(-3x)2×(-2x4)
= 9x2 × (-2x4)
= 9×(-2) ×x2×x4
= -18x6
(23x2y)3×9xy2
=827x6y3×9xy2
=83x7y5
【練習】
(-4x5)2
16x10
(-52a2b3c)3
-1258a6b9c3
6xy2×(-3x2y)2
54x5y4
(-34m2n)2×(2mn2)3
92m7n8