a(a-b)³+2a²(b-a)²-2ab(b-a)
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a(a-b)³+2a²(b-a)²-2ab(b-a)
(x+1)(2x-3)+2(x+1)(3-2x)+(x+)²·(2x-3),其中x=1/2
要求用提公因式法做,
(x+1)(2x-3)+2(x+1)(3-2x)+(x+)²·(2x-3),其中x=1/2
要求用提公因式法做,
a(a-b)³+2a²(b-a)²-2ab(b-a)
=a(a-b)³+2a²(a-b)²+2ab(a-b)
=a(a-b)[(a-b)²+2a(a-b)+2b]
=a(a-b)(3a²-4ab+b²+2b)
(x+1)(2x-3)+2(x+1)(3-2x)+(x+1)²·(2x-3),
=(x+1)(2x-3)-2(x+1)(2x-3)+(x+1)²(2x-3)
=(x+1)(2x-3)[1-2+(x+1)]
=x(x+1)(2x-3)
当x=1/2时
原式=1/2×3/2×(-2)
=-3/2
=a(a-b)³+2a²(a-b)²+2ab(a-b)
=a(a-b)[(a-b)²+2a(a-b)+2b]
=a(a-b)(3a²-4ab+b²+2b)
(x+1)(2x-3)+2(x+1)(3-2x)+(x+1)²·(2x-3),
=(x+1)(2x-3)-2(x+1)(2x-3)+(x+1)²(2x-3)
=(x+1)(2x-3)[1-2+(x+1)]
=x(x+1)(2x-3)
当x=1/2时
原式=1/2×3/2×(-2)
=-3/2
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
化简a/a-b - b-a+b + 2ab/a²-b²
分解因式 -a³+a²b-(1/4)ab² -2a(a+b)+b(a+b)
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
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(a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)
a(a-b)³+2a²(b-a)²-2ab(b-a)因式分解,
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
化简 a²-2ab+b²/a²-b²+b/a+b
化简:a²-2ab+b²/a²-b²+b/a+b