分解因式喔求完整点 1.y²-9(x+y)² 2.(x+y)²-16(x-y)²a²b²-0.01 x²y-2xy²+y三次方 16-(2a+3b)² (a²+4)²-16a² a²(a-b)²-b²(a+b)²
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![分解因式喔求完整点 1.y²-9(x+y)² 2.(x+y)²-16(x-y)²a²b²-0.01 x²y-2xy²+y三次方 16-(2a+3b)² (a²+4)²-16a² a²(a-b)²-b²(a+b)²](/uploads/image/z/4326905-65-5.jpg?t=%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E5%96%94%E6%B1%82%E5%AE%8C%E6%95%B4%E7%82%B9+1.y%26%23178%3B-9%EF%BC%88x%2By%EF%BC%89%26%23178%3B+2.%EF%BC%88x%2By%29%26%23178%3B-16%EF%BC%88x-y%EF%BC%89%26%23178%3Ba%26%23178%3Bb%26%23178%3B-0.01+x%26%23178%3By-2xy%26%23178%3B%2By%E4%B8%89%E6%AC%A1%E6%96%B9+16-%282a%2B3b%29%26%23178%3B+%EF%BC%88a%26%23178%3B%2B4%EF%BC%89%26%23178%3B-16a%26%23178%3B+a%26%23178%3B%EF%BC%88a-b%EF%BC%89%26%23178%3B-b%26%23178%3B%EF%BC%88a%2Bb%EF%BC%89%26%23178%3B)
分解因式喔求完整点 1.y²-9(x+y)² 2.(x+y)²-16(x-y)²a²b²-0.01 x²y-2xy²+y三次方 16-(2a+3b)² (a²+4)²-16a² a²(a-b)²-b²(a+b)²
分解因式喔求完整点 1.y²-9(x+y)² 2.(x+y)²-16(x-y)²
a²b²-0.01 x²y-2xy²+y三次方 16-(2a+3b)² (a²+4)²-16a² a²(a-b)²-b²(a+b)²
分解因式喔求完整点 1.y²-9(x+y)² 2.(x+y)²-16(x-y)²a²b²-0.01 x²y-2xy²+y三次方 16-(2a+3b)² (a²+4)²-16a² a²(a-b)²-b²(a+b)²
y²-9(x+y)² =[y+3(x+y)][(y-3(x+y)]=(3x+4y)(-3x-2y)=-(3x+4y)(3x+2y)
(x+y)²-16(x-y)²=[x+y+4(x-y)][(x+y-4(x-y)]=(5x-3y)(5y-3x)
a²b²-0.01=(ab+0.1)(ab-0.1)
x²y-2xy²+y三次方=y(x²-2xy+y²)=y(x-y)²
16-(2a+3b)²=(4+2a+3b)(4-2a-3b)
(a²+4)²-16a² =(a²+4+4a)(a²+4-4a)=(a+2)²(a-2)²
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)