因式分解3题、6y^4+19^2+10,6(a+b)^2+a+b-35,7(x-1)^2+4(x-1)(y+2)-20(
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因式分解3题、6y^4+19^2+10,6(a+b)^2+a+b-35,7(x-1)^2+4(x-1)(y+2)-20(y+2)^2
![因式分解3题、6y^4+19^2+10,6(a+b)^2+a+b-35,7(x-1)^2+4(x-1)(y+2)-20(](/uploads/image/z/8055058-58-8.jpg?t=%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A33%E9%A2%98%E3%80%816y%5E4%2B19%5E2%2B10%2C6%EF%BC%88a%2Bb%29%5E2%2Ba%2Bb-35%2C7%28x-1%29%5E2%2B4%28x-1%29%28y%2B2%29-20%28)
6y^4+19^2+10,
=(3y^2+2)(2y^2+5)
6(a+b)^2+a+b-35,
=[3(a+b)-7][2(a+b)+5]
=(3a+3b-7)(2a+2b+5)
7(x-1)^2+4(x-1)(y+2)-20(y+2)^2
=[7(x-1)-10(y+2)][(x-1)+2(y+2)]
=(7x-7-10y-20)(x-1+2y+4)
=(7x-10y-27)(x+2y+3)
=(3y^2+2)(2y^2+5)
6(a+b)^2+a+b-35,
=[3(a+b)-7][2(a+b)+5]
=(3a+3b-7)(2a+2b+5)
7(x-1)^2+4(x-1)(y+2)-20(y+2)^2
=[7(x-1)-10(y+2)][(x-1)+2(y+2)]
=(7x-7-10y-20)(x-1+2y+4)
=(7x-10y-27)(x+2y+3)
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