B1: rut gon bieu thuc
a, (x+y)^2-4(x-y)^2
b, 2(x-y)(x+y)+(x+y)^2+(x-y)^2
B2: tim X
a, (2X-1)^2-4(X+2)^2=9
b, 3(X-1)^2-3X(X-5)=21
B3: Cho bieu thuc
M=(x+3)^3-(x-1)^3+12x(x-1)
a, Rut gon bieu thuc tren
b, Tinh gia tri M tai x=-2/3
c, Tim x de M=16
(x-y)^2-4
x^2-16(x+y)^2
8x^3+36x^2y+5xy^2+27y^3
rut gon
a)(x^2+4)(x^2-4)-(x^2+1)(x^2-1)
b)(y-3)(y+3)(y^2+9)(y^2+2)(y^2-2)
1.thanh hieu hai binh phuong a)(x+y+4)*(x+y-4) b)(x-y+6)*(x+y-6) c)(y+2z-3)*(y-2z-3) d)(x+2y+3z)*(2y+3z-x)
2.rut gon a)(x+1)^2-(x-1)^2-3(x+1)*(x-1) b) 5(x+2)*(x-2)-1/2(6-8x)^2+17
3.tim x a)25x^2-9=0 b) (x+4)-(x+1(x-1)=16
Rut gon phan thuc
a, 3x(1-x)\2(x-1)
b, 3(x-y)(x-z)^2\6(x-y)(x-z)
c, x^2-16\4x-x^2 (x#0,x#4)
rut gon
a)\(\left(x-4\right)\left(x+4\right)x-\left(x^2+1\right)\left(x^2-1\right)\)
b)\(\left(y-3\right)\left(y+3\right)\left(y^2+9\right)-\left(y^2+2\right)\left(y^2-2\right)\)
c)\(x\left(x+\frac{1}{2}\right)-\left(2x-1\right)\left(x+\frac{3}{4}\right)\)
Rut gon
a)\(\left(x-4\right)\left(x+4\right)x-\left(x^2+1\right)\left(x^2-1\right)\)
b)\(\left(y-3\right)\left(y+3\right)\left(y^2+9\right)-\left(y^2+2\right)\left(y^2-2\right)\)
c)\(x\left(x+\frac{1}{2}\right)-\left(2x-1\right)\left(x+\frac{3}{4}\right)\)
giai chi tiet giup minh nhe
Rut gon
(5x3y2-4x2y3):2x2y2+(3x4y+6xy).3xy-x.(x2-\(\frac{1}{2}\))
rut gon A=xy^2-xz^2-y^3+yz^2/x^(z-y)+y^2(x-z)+z^2(y-x)
a) (3x + 2)² + (4x + (4x - 1)² + (2 + 5x). (2-5x) y - 2 ) ² + 2(x+ x+y = z) (²-y) + (z - y)² Bat 3. Rut gọn các biểu thức sau a) (3x + 2)² + (4x + (4x - 1)² + (2 + 5x). (2-5x) y - 2 ) ² + 2(x+ x+y = z) (²-y) + (z - y)² Bài 4. Tính nhanh, 8.9² + dd² + 22.89. a) (3x + 2)² + (4x + (4x - 1)² + (2 + 5x). (2-5x) y - 2 ) ² + 2(x+ x+y = z) (²-y) + (z - y)² a) (3x + 2)² + (4x
