(2x+1)^2+3(x-2)^2=7(x+3)(x-3)
网友回答
首先把式子展开如下:
4x^2+4x+1+3x^2-12x+12=7x^2-63
化简得:-8x=-76
x=19/2
======以下答案可供参考======
供参考答案1:
(2x+1)^2+3(x-2)^2=7(x+3)(x-3)
【解】4x^2+4x+1+3x^2-12x+12=7x^2-63
-8x=-76
x=-19/2
供参考答案2:
【解】4x^2+4x+1+3x^2-12x+12=7x^2-63
-8x=-76
x=19/2
=9.5