已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值
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![已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值](/uploads/image/z/1621606-22-6.jpg?t=%E5%B7%B2%E7%9F%A53a-5b%2B19%3D0%2Ca%2B8b-1%3D0%2C%E6%B1%82%284a%2B3b%29%5E2-8a-6a%E7%9A%84%E5%80%BC%E5%B7%B2%E7%9F%A53a-5b%2B19%3D0%2Ca%2B8b-1%3D0%2C%E6%B1%82%EF%BC%884a%2B3b%29%5E2-8a-6a%E7%9A%84%E5%80%BC)
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已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值
已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值
已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值
已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值已知3a-5b+19=0,a+8b-1=0,求(4a+3b)^2-8a-6a的值
3a-5b+19=0,a+8b-1=0
两式相加,得4a+3b+18=0,即4a+3b=-18
(4a+3b)^2-8a-6a=(4a+3b)^2-2*(4a+3b)=(4a+3b)(4a+3b-2)=(-18)*(-20)=360
根据前面两个式子,列一个二元一次方程,算出ab,再将得到的ab代入后面的式子,进行计算