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If x2+9x-3=3x2+2x(4-x), then x2=A、2B、3C、4D、9E、16 DThe statement 3x2+2x(4-x)
If x2+9x-3=3x2+2x(4-x), then x2=A、2B、3C、4D、9E、16 DThe statement 3x2+2x(4-x)
游客
2024-01-14
1
管理
问题
If x2+9x-3=3x2+2x(4-x), then x2=
选项
A、2
B、3
C、4
D、9
E、16
答案
D
解析
The statement 3x2+2x(4-x) can be restated as x2+8x. Thus, the original equation can be restated as x=3, so x2=9.
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