\(\left(3x+2+2\right)\left(3x+2-2\right)=\left(3x+4\right)3x\)
\(\left(3x+2+2\right)\left(3x+2-2\right)=\left(3x+4\right)3x\)
(3x-2)^3+6 (3x+1)(3x-1)+4
(3x -2)^3+6 (3x+1)(3x-1)+4
Tìm x biết
x³-(2+3x).(3x-2)=(4-2x+x²).(x+2)-(3x-5)²
2+x. 3x
------ +. -------
3-3x. 4x2-4
1 Tìm x
a,(2.x-5)2-(2.x-3)(2x+3)=5
b,(x+3)3-x(x+4)(x-4)=27
c,(3x-2)2-(3x+5)2=4
d, (3x+5)2-(x-3)2=0
Tìm x biết:
d) (x-2)3-(x-3).(x2+3x+9)+6.(x+1)2=15
e) (x-1)3+(2-x).(4+2x+x2)+3x.(x+2)=17
f) (3x+3)2-18x=36+(x-3).(x2+3x+9)
Giải chi tiết giúp mình nha.Cảm ơn.
Rút gọn :
a. ( x + 2 ) ( x2 - 2x + 4 ) - ( 1 - 3x ) ( 1 + 3x + 9x2)
b . ( x + y ) ( y2 - 2y + 4 ) + ( 5 - y ) ( 25 + 5y + y2)
Sử dụng 7 hằng đẳng thức ở lớp 8 để tính:
a. (2x-3) (4x2 + 6x +9) - (2x+3) (4x2 - 6x +9)
b. (x+1) (x2 - x +1) - (x-1) (x2 +x +1)
c. (3x-1) (3x+1) - (3x-2)2
d. (2x - 3)2 - (2x +3) (2x-3)
e. (3x-4)2 - (2x+4)2
f. (3x - 5)3 - (3x+5)3
g. (2x-1)2 - (3x-1)2
h. (x-2y) (x2 +2xy + 4y2) + (x3 - 6y3)
(x-5)(x+5)-(x+3)^2+3(x-2)^2=(x+1)^2-(x+4)(x-4)+3x^2