11点前务必答出!)1:4a(x-2)²-2b(2-x)³2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)4:6p(x-1)²-8p²(1-x)²5:(a-b)的2n次方-(b-a)2n+1次方
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11点前务必答出!)1:4a(x-2)²-2b(2-x)³2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)4:6p(x-1)²-8p²(1-x)²5:(a-b)的2n次方-(b-a)2n+1次方
11点前务必答出!)
1:4a(x-2)²-2b(2-x)³
2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)
3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)
4:6p(x-1)²-8p²(1-x)²
5:(a-b)的2n次方-(b-a)2n+1次方
11点前务必答出!)1:4a(x-2)²-2b(2-x)³2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)4:6p(x-1)²-8p²(1-x)²5:(a-b)的2n次方-(b-a)2n+1次方
1:4a(x-2)²-2b(2-x)³
=4a(x-2)²+2b(x-2)³
=2(x-2)²[2a+b(x-2)]
=2(x-2)²(bx+2a-2b)
2:(2x+3)(x-2y)+(x-2y)(x+1)+(2y-x)
=(2x+3)(x-2y)+(x-2y)(x+1)-(x-2y)
=(x-2y)[(2x+3)+(x+1)-1]
=3(x-2y)(x+1)
3:m²(a²+b²)-mn(b²+a²)+mp(a²+b²)
=m²(a²+b²)-mn(a²+b²)+mp(a²+b²)
=m(a²+b²)(m-n+p)
4:6p(x-1)²-8p²(1-x)²
=6p(x-1)²-8p²(x-1)²
=2p(x-1)²(3-4p)
5:(a-b)的2n次方-(b-a)2n+1次方
=(a-b)的2n次方+(a-b)2n+1次方
=(a-b)的2n次方[1+(a-b)]
=(a-b+1)(a-b)的2n次方