1) (x-1)(x+1)(x+2)
=(x2-1)(x+2)
=x3+2x2-x-2
2) (\(x-\frac{1}{2}\) )\(\left(x+\frac{1}{2}\right)\left(4x-1\right)\)
=\(\left(x+\frac{1}{4}\right)\left(4x-1\right)\)
=4x2-x +x-\(\frac{1}{4}\)
=4x2-\(\frac{1}{4}\)
1) (x-1)(x+1)(x+2)
=(x2-1)(x+2)
=x3+2x2-x-2
2) (\(x-\frac{1}{2}\) )\(\left(x+\frac{1}{2}\right)\left(4x-1\right)\)
=\(\left(x+\frac{1}{4}\right)\left(4x-1\right)\)
=4x2-x +x-\(\frac{1}{4}\)
=4x2-\(\frac{1}{4}\)
Tìm x, biết:
a) (2x+2)(x-1)-(x+2)(2x+1)=0;
b)(3x+1)(2x-3)-6x(x+2)=16;
c)(12x-5)(4x-1)+(3x-7)(1-16x)=81
mn ơi giúp mik vs ạ :<
A = ( 4x - 1 ) × ( 3x + 1 ) - 5x( x - 3 ) - ( x - 4 ) × ( x -3 )
B = ( 5x - 2 ) × ( x + 1 ) - 3x( x^2 - x - 3 ) - 2x(x - 5 ) × ( x - 4 )
Giúp mk vs ạ mình đang cần gấp 😊
Rút gọn biểu thức:
a)3x×(4x-3)-(2x-1)×(6x+5)
b)3x×(x-1)^2-2x×(x+3)×(x-3)+4x×(x-4)
c)(x-1)^3×(x+2)×(x^2x+4)+3×(x+4)×(x-4)
d)(x+1)×(x^2+x+1)×(x-1)×(x^2-x+1)
Giúp mk vs nha. Cảm ơn các bạn nhiều♡♡♡¤¤¤☆☆☆
Việt Nam vô địch..♡♡♡☆☆☆☆☆☆
Làm hộ mình bài này với
Tìm x
a, 3x.(2x+3)-(2x+5).(3x-2)=8
b, 4x.(x-1)-3(x(mũ 2) -5)-x(mũ 2 )=(x-3). (x-4)
c, 2 .(5x-8) -3.(4x-5)=4.(3x-4)+11
d, 2x(mũ 2)+ 3.(x-1) (x+1)
Giúp mk vs ạ
Bài 1:Rút gọn:
a,(x+2)(x2+4x+4)-(x-2)(x2-4x-4)-12x2-x
b,(x-2)(x+2)(x+3)-(x+1)(x2-x+1)
Ai làm đúng và nhanh giúp, mình tick liền cho ạ
Cho M= \(\left(x-a\right)\left(x-b\right)+\left(x-b\right)\left(x-c\right)+x^2\)
M the a,b,c biết \(x=\dfrac{1}{2}a+\dfrac{1}{2}b+\dfrac{1}{2}c\)
Ai giups mk vs ai nhanh mk sẽ vote nha
1) (\(\dfrac{1}{2}\)x + 3)*(x2- 4x- 6)
2) (6x2 -9x +15)*(\(\dfrac{2}{3}\)x+1)
3) (3x2 -x+5)*(x3+5x-1)
4) (x-1)*(x+1)*(x-2)
5) D=(x-7)*(x+5)-(x-4)*(x+3)
6) E= 4x*(x2-x-1)-(x+3)*(x2-2)
7) F= 5x*(x-3)*(x-1)-4x*(x2-2x)
Bài 1: Nhân
a) 4x(3x-1)-2(3x+1)-(x+3)
b) (-2x^2-1xy+2y^2)(-1x^2y)
c) 4x(3x^2-x) -(2x+3)^2(6x^2-3x+1)
d) (x-2)(x+2)(x+4)
Bài 2: Tìm x
a) 4x(x-1)-3(x^2-5)-x^2=(x-3)(x+4)
b) 2(3x-1)(2x+5-6)(2x-1)(x+2)=6
c) 3(2x-1)(3x-1)-(2x-3)(9x-1)-3=-3
1. Tìm x
a.( 8x-3)*(3x+2)-(4x+7)*(x+4)=(4x+1)*(5x-1).
b.2x2+3*(x-1)*(x+1)=5x*(x+1).
c.(8+5x)*(x+2)+4*(x-2)*(x+1)+2(x-2)*(x+2)=6.
d.4*(x-1)*(x+5)-(x+2)*(x+5)=3*(x-1)*(x+2).
Mong các bạn giải nhanh giùm mình :D