已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+吗(xy-9y^2)已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/08 20:21:42
![已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+吗(xy-9y^2)已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)](/uploads/image/z/1088510-14-0.jpg?t=%E5%B7%B2%E7%9F%A5%E6%95%B0m%2Cx%2Cy%E6%BB%A1%E8%B6%B3%E2%91%A04%2F3%28x-5%29%5E2%2B5%7Cm%7C%3D0%3B%E2%91%A1-3a%5E2b%5E%28y%2B1%29%E4%B8%8E4b%5E3a%5E2%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E6%B1%82%E5%A4%9A%E9%A1%B9%E5%BC%8F2x%5E2-6y%5E2%2B%E5%90%97%EF%BC%88xy-9y%5E2%EF%BC%89%E5%B7%B2%E7%9F%A5%E6%95%B0m%2Cx%2Cy%E6%BB%A1%E8%B6%B3%E2%91%A04%2F3%28x-5%29%5E2%2B5%7Cm%7C%3D0%3B%E2%91%A1-3a%5E2b%5E%28y%2B1%29%E4%B8%8E4b%5E3a%5E2%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E6%B1%82%E5%A4%9A%E9%A1%B9%E5%BC%8F2x%5E2-6y%5E2%2Bm%EF%BC%88xy-9y%5E2%EF%BC%89-%283x%5E2-3xy%2B7y%5E2%29)
已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+吗(xy-9y^2)已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)
已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+吗(xy-9y^2)
已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)的值.
已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+吗(xy-9y^2)已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项,求多项式2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)
已知数m,x,y满足①4/3(x-5)^2+5|m|=0;②-3a^2b^(y+1)与4b^3a^2是同类项
所以x-5=0,m=0,y+1=3
所以x=5,y=2,m=0
所以2x^2-6y^2+m(xy-9y^2)-(3x^2-3xy+7y^2)
=2*5^2-6*2^2+0*(xy-9y^2)-(3*5^2-3*5*2+7*2^2)
=50-24-(75-30+28)
=26-73
=-47