\(\left(3x-4\right)\left(3x+4\right)+\left(x-5\right)\left(x-3\right)=10x^2+3\)
\(\Leftrightarrow9x^2-16+x^2-8x+15-10x^2-3=0\)
\(\Leftrightarrow-8x=4\)
hay \(x=-\dfrac{1}{2}\)
Rút gọn :
1. (2x-5)(3x+1)-(x-3)^2+(2x+5)^2-(3x+1)^3
2. (2x-1)(2x+1)-3x-2)(2x+3)-(x-1)^3+(2x+3)^3
3. (x-2)(x^2+2x+4)-(3x-2)^3+(3x-4)^2
4. (7x-1)(8x+2)-(2x-7)^2-(x-4)^3-(3x+1)^3
5. (5x-1)(5x+1)-(x+3)(x^2-3x+9)-(2x+4)^2-(3x-4)^2+(2x-5)^3
6. (4x-1)(x+2)-(2x+5)^2-(3x-7)^2+(2x+3)^3=(3x-1)^3
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
1.(x+3)2-(x+2).(x-2)=4x+17
2.(2x+1)2-(4x-1).(x-3)-15=0
3.(2x+3).(x-1)+(2x-3).(1-x)=0
4.2(5x-8)-3(4x-5)=4(3x-4)+11
5.(3x-1).(2x-7)-(1-3x).(6x-5)=0
a) (x^2+4)(x+2)(x-2)-(x^2+3)(x^2-3)
b)(3x-2)(9x^2+6x+4)-3(9x^3-2)
c)(3x+5)^2+(6x+10)(2-3x)+(2-3x)^2
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
1) Rút gọn
a) (3x - 2)2 - (1+ 5x)2
b) (3x + 4)(3x - 4) - (5 - x)2
c) (\(\dfrac{1}{2}\)x + 4)2 - (\(\dfrac{1}{2}\)x + 3)(\(\dfrac{1}{2}\)x - 3)
1 Tìm x
a,(x+3)3-x(x+4)(x-4)=27
b,(3x-2)2-(3x+5)2=4
c, (3x+5)2-(x-3)2=0
1, tìm x :
a) (x+2).(x+3)-(x-2).(x+5)=0
b) (2x+3).(x-4)+(x-5).(x-2)=(x-4).(3x-5)
c) (3x-5).(7-5x)-(5x+2).(2-3x)=3
d)(x-7).(x+7)-(x-4)2-x=10+3
e) (x+1/2)2-(x-1).(x+1)=2x-1
2, Thu gọn :
a) (x+5)2-(3-x)2-2(x-4).(x+4)
b)4(x-1)2+(2x+3)2-8(x-2)(x+2)
1, ( x+1/3)^3
2, ( 2x+y^2)^3
3, ( 1/2x^2+1/3y)^3
4, ( 3x^2-2y)^3
5, ( 2/3x^2-1/2y)^3
6, ( 2x+1/2)^3
7, ( x-3)^3
8, ( x+1).(X^2+3x+9)
9, ( x-3).( x^2+3x+9)
10, ( x-2).( x^2+2x+4)
11, ( x+4).( x^2-4x+16)
12, ( x-3y).( x^2+3xy+9y^2)
13, ( x^2-1/3). ( x^4+1/3x^2+1/9)
14, ( 1/3x+2y).( 1/9x^2-2/3xy+4y^2)
Đưa về HĐT
