分解因式(3)-a²+196b²(4)-12xy+x²+36y²(5)a²(a-b)²-b²(a+b)² (6)(x²-2x)²-1 化简下列各式(2)(2-2a)分之(a²-1)*(a²+2a+1)分之(a²+a)
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分解因式(3)-a²+196b²(4)-12xy+x²+36y²(5)a²(a-b)²-b²(a+b)² (6)(x²-2x)²-1 化简下列各式(2)(2-2a)分之(a²-1)*(a²+2a+1)分之(a²+a)
分解因式(3)-a²+196b²(4)-12xy+x²+36y²
(5)a²(a-b)²-b²(a+b)² (6)(x²-2x)²-1 化简下列各式(2)(2-2a)分之(a²-1)*(a²+2a+1)分之(a²+a) (3) (a-b分之a)²÷(b-a)分之a
分解因式(3)-a²+196b²(4)-12xy+x²+36y²(5)a²(a-b)²-b²(a+b)² (6)(x²-2x)²-1 化简下列各式(2)(2-2a)分之(a²-1)*(a²+2a+1)分之(a²+a)
(3)-a²+196b²
=196b²-a²
=(14b+a)(14b-a)
(4)-12xy+x²+36y²
=x²-12xy+36y²
=(x-6y)²
(5)a²(a-b)²-b²(a+b)²
=[a(a-b)+b(a+b)][a(a-b)-b(a+b)]
=(a²+b²)(a²-2ab-b²)
(6)(x²-2x)²-1
=(x²-2x+1)(x²-2x-1)
=(x-1)²(x²-2x-1)
化简下列各式
(2)(2-2a)分之(a²-1)*(a²+2a+1)分之(a²+a)
=(a+1)(a-1)/[-2(a-1)]×a(a+1)/(a+1)²
=-a/2
(3) (a-b分之a)²÷(b-a)分之a
=a²/(a-b)²×[-(a-b)/a]
=a/(b-a)
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