已知(x+1)²+|y-2|=0,求(2x²-2y²)-3(x²y²+
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/08/14 23:58:08
已知(x+1)²+|y-2|=0,求(2x²-2y²)-3(x²y²+x²)+3(x²y²+y²)的值
已知(x+1)²+|y-2|=0,
满足 x+1 = 0 y-2 = 0
x = -1 y=2
(2x²-2y²)-3(x²y²+x²)+3(x²y²+y²)的值
= 2x²-2y²-3x²y²-3x²+3x²y²+3y²
= -x²+y²
= ( x+y) ( y-x)
= ( -1+2) ( 2 +1)
= 1 x 3
= 3
施主,我看你骨骼清奇,
器宇轩昂,且有慧根,
乃是万中无一的武林奇才.
潜心修习,将来必成大器,
鄙人有个小小的考验请点击在下答案旁的
"选为满意答案"
满足 x+1 = 0 y-2 = 0
x = -1 y=2
(2x²-2y²)-3(x²y²+x²)+3(x²y²+y²)的值
= 2x²-2y²-3x²y²-3x²+3x²y²+3y²
= -x²+y²
= ( x+y) ( y-x)
= ( -1+2) ( 2 +1)
= 1 x 3
= 3
施主,我看你骨骼清奇,
器宇轩昂,且有慧根,
乃是万中无一的武林奇才.
潜心修习,将来必成大器,
鄙人有个小小的考验请点击在下答案旁的
"选为满意答案"
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
已知|x+y+2|+(2x-3y-1)²=0 求 ⑴x、y的值 ⑵2x³-x²-3y
已知x²+|y+x|=x-1/4,求(3x+y)²(2x-y)²-(4x²+y&
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
已知x-3y=0,y≠0,求x²-2xy+y²分之2x+y×(x-y)的值
已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y
已知实数x,y满足根号(x+3y-1)+y²+2y+1=0,求2x-y的平方根
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y