x+y=0.2 x+3y=1 求3x²+12xy+12y²的值
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x+y=0.2x+3y=1求3x²+12xy+12y²的值x+y=0.2x+3y=1求3x²+12xy+12y²的值x+y=0.2x+3y=1求3x²
x+y=0.2 x+3y=1 求3x²+12xy+12y²的值
x+y=0.2 x+3y=1 求3x²+12xy+12y²的值
x+y=0.2 x+3y=1 求3x²+12xy+12y²的值
x+3y-x-y=2y=0.8 y=0.4 x=-0.2 原式=3(x+2y)*(x+2y)=3*0.6*0.6=1.08
x+y=0.2 x+3y=1
2x+4y=1.2
x+2y=0.6
3x²+12xy+12y²
=3(x+2y)^2
=3*0.6^2
=1.08
3x²+12xy+12y²=3(x+2y)²=3*0.6²=1.08