已知a^2+b^2+2c^2+2bc+2ac=0 求a+b 已知a^2+b^2+a^2× b^2+10ab+16=0 求a+b-ab已知x^2-3x-2=0 求x^2+4/x^2已知a^2+b^2=8,a-b=3,求ab已知x=-5,y=1/5,求x^2×x^2n×(y^n)^2
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![已知a^2+b^2+2c^2+2bc+2ac=0 求a+b 已知a^2+b^2+a^2× b^2+10ab+16=0 求a+b-ab已知x^2-3x-2=0 求x^2+4/x^2已知a^2+b^2=8,a-b=3,求ab已知x=-5,y=1/5,求x^2×x^2n×(y^n)^2](/uploads/image/z/12704861-29-1.jpg?t=%E5%B7%B2%E7%9F%A5a%5E2%2Bb%5E2%2B2c%5E2%2B2bc%2B2ac%3D0+%E6%B1%82a%2Bb+%E5%B7%B2%E7%9F%A5a%5E2%2Bb%5E2%2Ba%5E2%C3%97+b%5E2%2B10ab%2B16%3D0+%E6%B1%82a%2Bb-ab%E5%B7%B2%E7%9F%A5x%5E2-3x-2%3D0+%E6%B1%82x%5E2%2B4%2Fx%5E2%E5%B7%B2%E7%9F%A5a%5E2%2Bb%5E2%3D8%2Ca-b%3D3%2C%E6%B1%82ab%E5%B7%B2%E7%9F%A5x%3D-5%2Cy%3D1%2F5%2C%E6%B1%82x%5E2%C3%97x%5E2n%C3%97%EF%BC%88y%5En%29%5E2)
已知a^2+b^2+2c^2+2bc+2ac=0 求a+b 已知a^2+b^2+a^2× b^2+10ab+16=0 求a+b-ab已知x^2-3x-2=0 求x^2+4/x^2已知a^2+b^2=8,a-b=3,求ab已知x=-5,y=1/5,求x^2×x^2n×(y^n)^2
已知a^2+b^2+2c^2+2bc+2ac=0 求a+b
已知a^2+b^2+a^2× b^2+10ab+16=0 求a+b-ab
已知x^2-3x-2=0 求x^2+4/x^2
已知a^2+b^2=8,a-b=3,求ab
已知x=-5,y=1/5,求x^2×x^2n×(y^n)^2
已知a^2+b^2+2c^2+2bc+2ac=0 求a+b 已知a^2+b^2+a^2× b^2+10ab+16=0 求a+b-ab已知x^2-3x-2=0 求x^2+4/x^2已知a^2+b^2=8,a-b=3,求ab已知x=-5,y=1/5,求x^2×x^2n×(y^n)^2
a^2+b^2+2c^2+2bc+2ac=a^2+2ac+c^2+b^2+c^2+2bc=(a+c)^2+(b+c)^2=0
则a=-c b=-c
a+b=-2c
a^2+b^2+a^2*b^2+10ab+16=a^2+2ab+b^2+a^2*b^2+8ab+16=(a+b)^2+(ab+4)^2=0
则a=-b ab=-4
a+b-ab=4
x^2-3x-2=0
则x=
a^2+b^2=(a-b)^2+2ab=8,a-b=3,
则ab=(3^2-8)/(-2)=-1/2
x=-5,y=1/5,
x^2*x^2n*(y^n)^2
=x^(2n+2)*y^2n
=(-5)^(2n+2)*(1/5)^2n
=5^(2n+2)*5^(-2n)
=5^2
=25
http://zhidao.baidu.com/question/54874278.html?si=4
1. 0
http://zhidao.baidu.com/question/120177970.html?si=2
2. 8
http://zhidao.baidu.com/question/50575195.html?si=7
4.ab=-1/2
http://zhidao.baidu.com/question/144386138.html?si=1
5. 1
仁兄的 ^ 是乘以吗?
都是配方就可以了
1.0
2.-4