(y³﹚⁴·y²+﹙y²﹚²·y的10次方(aⁿb的3n次方)²+﹙a²b的6次方)ⁿ(-4xy³﹚²﹙-2x﹚²½m(m²+5m-4m³﹚(a-b)(a+b)-2(b²-a²﹚(x+3)(y+4)-(x+2)(y-3)
问题描述:
(y³﹚⁴·y²+﹙y²﹚²·y的10次方
(aⁿb的3n次方)²+﹙a²b的6次方)ⁿ
(-4xy³﹚²﹙-2x﹚²
½m(m²+5m-4m³﹚
(a-b)(a+b)-2(b²-a²﹚
(x+3)(y+4)-(x+2)(y-3)
答
拍\7
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答
(y³﹚⁴·y²+﹙y²﹚²·y的10次方
=y的12次方×y²+y的4次方×y的10次方
=y的14次方+y的14次方
=2y的14次方
(aⁿb的3n次方)²+﹙a²b的6次方)ⁿ
=a的2n次方b的6n次方+a的2n次方b的6n次方
=2a的2n次方b的6n次方
(-4xy³﹚²﹙-2x﹚²
=16x²y的6次方×4x²
=64x的4次方y的6次方
½m(m²+5m-4m³﹚
=m³/2+5m²/2-2m的4次方
(a-b)(a+b)-2(b²-a²﹚
=a²-b²-2b²+2a²
=3a²-3b²
(x+3)(y+4)-(x+2)(y-3)
=xy+4x+3y+12-xy+3x-2y+6
=7x+y+18