8x^2-40x/30x^2-6x^3

题目详情

8x^2-40x/30x^2-6x^3

▼优质解答

答案和解析

8X^2-40X=8X-72 8X^2-48X+72=0 X^2-6X+9=0 (X-3)^2=0 X=3 x -5x=x-9 x -6x+9=0 (x-3) =0 x=3 =8x^2-40x-

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