当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?

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当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?当x=-2/1时,多项式3x^2-(7x-(4x-3

当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?
当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?

当x=-2/1时,多项式3x^2-(7x-(4x-3)-2x^2)的值为?
3x2-(7x-(4x-3)-2x2)
=3x2-(7x-4x+3)-2x2)
=3x2-3x-3-2x2)
=x2-3x-3
X=-2 则3x2-(7x-(4x-3)-2x2)=4+6-3=7