Question

一条初一数学题（答到追加100分,急）

Answer 1

是 2X^2 + (3-c)x + c =10

把 X=2 代入上式,得：8 + (3-c) * 2 + c = 0

解得 c = -8

把 c = -8 和 x = -3 代入代数式,得：

2 * ( -3)^2 + (3 + 8) * (-3) + (-3) = -18