2x²+3x+7=8
那么2x²+3x=1
4x²+6x+15=2(2x²+3x)+15=2+15=17
若代数式2x²+3x+7的值为8则代数式4x²+6x+15的值为
若代数式2x²+3x+7的值为8则代数式4x²+6x+15的值为
若代数式2x²3x+7的值为8则代数式4x²+6x+15的值为
若代数式2x²3x+7的值为8则代数式4x²+6x+15的值为
数学人气:735 ℃时间:2019-10-11 05:03:36
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