(2x-y)(2x+y)=-5/2(2y^2-64/5) 求(x-y)² 2x(y-1)+4(1/2x-1)=
1个回答
(2x-y)(2x+y)=-5/2(2y^2-64/5)
4X^2-y^2=-5y^2+32
4X^2+4y^2=32
X^2+y^2=8
你的题有没有符号错的地方,
相关问题
已知(2x-y)(2x+y)=-5/2(2y²-64/5),2x(y-1)+4(1/2x-1)=0.
若x1^2+5x2^2=10,x2y1-x1y2=5,x1y1+5x2y2=15,求y1^2+5y2^2
已知2x+y/2=5x+2y/4=1求x+2y+1/2x-5y+7
{x/3-y=5 (1) {x/4-y=1 (2) {5x+2y=5 (1) {2x+5y=8 (2)
①.x2-2x-1 ②.4(x-y+1)+y(y-2x) ③.3x2+5xy-2y2+x+9y-4 ④.x2-5x+3
1)已知x^2+y^2-2x+4y+5=0,求x^4-y^4/(x+y)(2x-y)`2x-y/x
【4】(-2x+3y)(-2x-3y) 【5】(-1/4x-2y)(-1/4x+2y) 【6】x^2+(y-x)(y+x
(1)(2x-5y)^2 (2) (-1/3x+3/2y)^2 (3) (-2x-5y)^2 (4)(1/2x-4y)^
(1)(2x+y-5)(2x-y+5) (2)(x+y)(x-y)-(x-y)²
2元1次方程4x+5y=98,4x+2=5y,求x=,y= 2元1次方程4x+5y=98,4x+2=5y,求x=,y=”