1.x^2+xy-6y^2如何分解因式?x^2+5xy+6y^2呢?2.若x^2-3x+1=0,求x^4+1/x^4的值3.已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值4.计算102^2+98^2=_______.
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![1.x^2+xy-6y^2如何分解因式?x^2+5xy+6y^2呢?2.若x^2-3x+1=0,求x^4+1/x^4的值3.已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值4.计算102^2+98^2=_______.](/uploads/image/z/3190294-46-4.jpg?t=1.x%5E2%2Bxy-6y%5E2%E5%A6%82%E4%BD%95%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%3Fx%5E2%2B5xy%2B6y%5E2%E5%91%A2%3F2.%E8%8B%A5x%5E2-3x%2B1%3D0%2C%E6%B1%82x%5E4%2B1%2Fx%5E4%E7%9A%84%E5%80%BC3.%E5%B7%B2%E7%9F%A5x%5E2%2By%5E2%2B6x-4y%2B13%3D0%2C%E6%B1%82%EF%BC%88x%2By%29%5E2008%E7%9A%84%E5%80%BC4.%E8%AE%A1%E7%AE%97102%5E2%2B98%5E2%3D_______.)
1.x^2+xy-6y^2如何分解因式?x^2+5xy+6y^2呢?2.若x^2-3x+1=0,求x^4+1/x^4的值3.已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值4.计算102^2+98^2=_______.
1.x^2+xy-6y^2如何分解因式?x^2+5xy+6y^2呢?
2.若x^2-3x+1=0,求x^4+1/x^4的值
3.已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值
4.计算102^2+98^2=_______.
1.x^2+xy-6y^2如何分解因式?x^2+5xy+6y^2呢?2.若x^2-3x+1=0,求x^4+1/x^4的值3.已知x^2+y^2+6x-4y+13=0,求(x+y)^2008的值4.计算102^2+98^2=_______.
(1):x^2+xy-6y^2=(x-2y)(x+3y);x^2+5xy+6y^2=(x+2y)(x+3y);(2)x^2-3x+1=0,x+1/x=3;(x+1/x)^2=3^2,x^2+1/x^2=7,(x^2+1/x^2)^2=7^2,x^4+1/x^4=49-2=47;(3):x^2+y^2+6x-4y+13=0,(x^2+6x+9)+(y^2-4y+4)=0,(x+3)^2+(y-2)^2=0,x+3=y-2=0,x=-3,y=2;(x+y)^2008=(-3+2)^2008=1;(4):102^2+98^2=(100+2)^2+(100-2)^2=100^2+400+4+100^2-400+4=2*100^2+8=20008
(x-2y)(x+3y)
(x+2y)(x+3y)
既然超简单,你自己不会做啊
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