来自郭茂祖的问题
试说有代数式:(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²+9x-y)的值与X无关,求值?
试说有代数式:(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²+9x-y)的值与X无关,求值?
1回答
2020-12-11 05:33
试说有代数式:(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²+9x-y)的值与X无关,求值?
试说有代数式:(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²+9x-y)的值与X无关,求值?
(4x²-7x+6y-1)-(-2x²+3y²+2y+2x)+(-6x²+9x-y)
=4x²-7x+6y-1+2x²-3y²-2y-2x-6x²+9x-y
=-3y²+3y-1的值与X无关