已知2x2+3x+1的值是10,则代数式4x2+6x+1的值是 ___ .
人气:187 ℃ 时间:2020-05-06 20:00:12
解答
由题意,得
2x2+3x+1=10
∴2x2+3x=9
∵4x2+6x+1=2(2x2+3x)+1
=2×9+1
=19
∴代数式4x2+6x+1的值是:19
故答案为:19
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