(3-2x)(2x+3)+(-3-2x)平方 看补充 计算(x-2y+3)(x+2y-3)分解因式 a²(b-2)+b²(2-b)(4a-3b)²-25b²(4a²+b²)³-(4ab)²(a²-1)²+6(1-a²)+9打的好有过程再给30
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(3-2x)(2x+3)+(-3-2x)平方 看补充 计算
(x-2y+3)(x+2y-3)
分解因式 a²(b-2)+b²(2-b)
(4a-3b)²-25b²
(4a²+b²)³-(4ab)²
(a²-1)²+6(1-a²)+9
打的好有过程再给30 求求大侠们了,
计算:
(3-2x)(2x+3)+(-3-2x)²
=6x+9-4x²-6x+9+6x+4x²
=18
(x-2y+3)(x+2y-3)
=[x-(2y-3)][x+(2y-3)]
=x²-(2y-3)²
=x²-(4y²-12y+9)
=x²-4y²+12y-9)
分解因式 :
a²(b-2)+b²(2-b)
=a²(b-2)-b²(b-2)
=(2-b)(a²-b²)
=(2-b)(a-b)(a+b)
(4a-3b)²-25b²
=(4a-3b-5b)(4a-3b+5b)
(4a²+b²)³-(4ab)²
=(4a²+b²)³-[3√(4ab)²]³
={(4a²+b²)-[3√(4ab)²]}{(4a²+b²)²+(4a²+b²)[3√(4ab)²]+[3√(4ab)²]²}
(a²-1)²+6(1-a²)+9
=(a²-1)²-6(a²-1)+9
=(a²-1-3)²
=(a²-4)²
=[(a-2)(a+2)]²
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