计算:3(x²+2)-3(x+1)(x-1)赶紧的,谢了
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计算:3(x²+2)-3(x+1)(x-1)
赶紧的,谢了
3(x²+2)-3(x+1)(x-1)
=3x²+6-3(x²-1)
=3x²+6-3x²+3
=9
9
3(x²+2)-3(x+1)(x-1)
=3x²+6-3x^2+3
=9
计算:3(x²+2)-3(x+1)(x-1)
赶紧的,谢了
3(x²+2)-3(x+1)(x-1)
=3x²+6-3(x²-1)
=3x²+6-3x²+3
=9
9
3(x²+2)-3(x+1)(x-1)
=3x²+6-3x^2+3
=9