giai pt x^2-y^2=xy
(x,y>0)
1, (x+1)2-3(x+1)
2, 2x(x-2) - (x-2)2
3, 4x2-20xy+ 25y2
4, x2+3x-x-3
5, x2-xy+x-y
6, 2y(x+2)-3x-6 giai giup em voi ạ
1 . (3x-5)^2 - (x-1)^2
2 . x^2 - 7x + 10
3 . 3x^2 + 7x + 10
4 . 2x^2 - 16x - 8y^2 + 32
5. 3x^2 + xy^2 - x - y
6 . 2x^2 -2y^2 + 3x - 3y
7 . 36 - 4x^2 - 4xy - y^2
Giai hộ mình nha
Thực hiện phép tính
1/ -2x^2 + 3 ( x^2 + xy + 2 )
2/ 5y^2 - 5 ( y^2 + 2y + 1 )
3/ xy^2 - y^2 ( x - 2 + 3^2 )
4/ 1/2ab + 3/2(-ba + 2a + 2 )
5/ x(x+y) - 2x (x+2)
6/ x(x^2 + x + 1 ) - x (2x^2 + 1 )
ai giai giùm m voi m cam ơn nhiêu
a. Giai pt : 2x(8x-1)^2(4x-2)=9
b. giai pt : x^2-y^2+2x-4y-10=0 vs x,y thuoc so nguyen duong
Chứng minh đa thức
x22+xy+y22=3(x+y/2)2+(x-y/2)2(x+y)(x2-xy+y2)-(x-y)(x22+xy+y2)=2y(x+y)3-(x-y)(x2+xy+y2)=y(3x2+3xy+2y22)giai pt ; (2x+7)^2=9(x+2)
D = (x-y / 2y-x - x^2 +y^2 +y-2 / x^2 - xy -2y^2 ) / 4x^4 +4x^2*y +y^2 -4 /x^2 +xy+x+y / x+1 / 2x^2 +y+2
Kb mik nho@ cam on mn nhìu ^.^ :)
giai pt 2(x^2+x+1)^2-7(x-1)^2=13(x^3-1)