(1)4x^2+3y-3xy-4x(2) -(a^2-b^2)^2+(a^2+b^2)(a+b)^2(3)-2.89×52^2+2.89×48^2 (这题是用因式分解计算,要结果)抱歉第二题是-(a^2-b^2)^2+2(a^2+b^2)(a+b)^2
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![(1)4x^2+3y-3xy-4x(2) -(a^2-b^2)^2+(a^2+b^2)(a+b)^2(3)-2.89×52^2+2.89×48^2 (这题是用因式分解计算,要结果)抱歉第二题是-(a^2-b^2)^2+2(a^2+b^2)(a+b)^2](/uploads/image/z/1851432-24-2.jpg?t=%EF%BC%881%EF%BC%894x%5E2%2B3y-3xy-4x%282%29+-%28a%5E2-b%5E2%29%5E2%2B%28a%5E2%2Bb%5E2%29%28a%2Bb%29%5E2%283%29-2.89%C3%9752%5E2%2B2.89%C3%9748%5E2+%EF%BC%88%E8%BF%99%E9%A2%98%E6%98%AF%E7%94%A8%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E8%AE%A1%E7%AE%97%2C%E8%A6%81%E7%BB%93%E6%9E%9C%EF%BC%89%E6%8A%B1%E6%AD%89%E7%AC%AC%E4%BA%8C%E9%A2%98%E6%98%AF-%28a%5E2-b%5E2%29%5E2%2B2%28a%5E2%2Bb%5E2%29%28a%2Bb%29%5E2)
(1)4x^2+3y-3xy-4x(2) -(a^2-b^2)^2+(a^2+b^2)(a+b)^2(3)-2.89×52^2+2.89×48^2 (这题是用因式分解计算,要结果)抱歉第二题是-(a^2-b^2)^2+2(a^2+b^2)(a+b)^2
(1)4x^2+3y-3xy-4x
(2) -(a^2-b^2)^2+(a^2+b^2)(a+b)^2
(3)-2.89×52^2+2.89×48^2 (这题是用因式分解计算,要结果)
抱歉第二题是-(a^2-b^2)^2+2(a^2+b^2)(a+b)^2
(1)4x^2+3y-3xy-4x(2) -(a^2-b^2)^2+(a^2+b^2)(a+b)^2(3)-2.89×52^2+2.89×48^2 (这题是用因式分解计算,要结果)抱歉第二题是-(a^2-b^2)^2+2(a^2+b^2)(a+b)^2
1 4x^2+3y-3xy-4x=4x(x-1)-3y(x-1)=(x-1)(4x-3y)
2 -(a^2-b^2)+(a^2+b^2)(a+b)^2=-(a+b)^2(a-b)^2+(a^2+b^2)(a+b)^2
=(a+b)^2[(-a^2-b^2+2ab)+(a^2+b^2)]
=2ab(a+b)^2
3 -2.89(52^2-48^2)
=-2.89(52+48)(52-48)
=-289*4
=-1156
1.4x(x-1)+3y(1-x)=(x-1)(4x-3y)
2.(a^2+b^2)(a+b)^2-(a+b)^2(a-b)^2=2ab(a+b)^2
3.2.89(48^2-52^2)=2.89(48+52)(48-52)=-1156
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