Rút gọn:
A=(x^4 - 3x^2 + 9)(x^2 + 3) + (3 - x^2)^2
M= 5(x+2y)^2 - (3y + 2x)^2 + (4x - y)^2 + 3(x - 2y)(x + 2y)
E= (6x + 1)^2 + (6x - 1)^2 - 2(1 + 6x)(6x - 1)
C= (x^2 + 4)(x + 2)(x -2) - (x^2 - 3)^3
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
Bài 3. Rút gọn các đa thức sau
a/ (2x-3)(4x^2+6x+9)- (2x+1)(4x^2 - 2x +1)
b/ (x+ 2)(x^2- 2x+4) – (x^3- 2)
c/ (3x+ 5)(9x^2 - 15x +25)- 3x(3x-1)(3x+1)
d/ x^6 - (x^2 + x +1)(x^2 - 1)(x^2 - x+ 1)
Tìm x. biết:
a/12(x-2)(x+2)-3(2x+3)2 =52
b/(2x+1)2 -4(x-1)(x+1)+2x=5
c/(x-2)3-(x-3)(x2+3x+9)+6(x+1)2=15
d/(x+2)(x2-2x+4)-x(x2+2)=15
e/ 12(x-2)(x+2)-3(2x+3)2=57
f/ (3-x)(3+x)+(3x-1)2+6x=522
g/(2x+1)2-4(x-1)(x+1)+2x=5
Tìm x: a)(2x+1)(1-2x)+(1-2x)^2=18
b) 2(x+1)^2-(x-3)(x+3)-(x-4)^2=0
c) (x-5)^2-x(x-4)=9
d) (x-5)^2+(x-4)(1-x)=0
Rút gọn:
1. (x+3)3- x +2)(x-2)-6x2-20
2. (2x+3)(4x2-6x+9)-(2x-3)(4x2+6x+9)
3. (2x-1)(4x2+2x+1)(2x+1)(4x2-2x+1)
4. (x+4)(x2-4x+16)-(50+x2)
Giúp mình với. Cảm ơn!!!
Tìm x
a,(7x+4)^2-(7x+4)(7x-4)=0
b, 5( x + 3 )( x - 3 ) + ( 2x + 3 )^2+(x-6)^=10
c, (x + 1)^3 + (x – 2)^3 – 2x^2 (x – 1,5) = 3
d,( x + 2)(x^2 – 2x + 4)(x – 2)(x^2 + 2x + 4) = – 65
e, 4x^2 + 4x – 5 = 2
f,16x^2 – 9(x + 1)^2 = 0
Các bạn giúp mình vs mai mình phải nộp rùii
Tìm x :
1) ( 5x - 1 ) ( x + 1) - 2 ( x - 3 )2 = ( x + 2 ) ( 3x - 1 ) - ( x + 4 )2 + ( x2 - x )
2) ( 3x + 4 ) ( 3x - 4 ) - ( 2x + 5 )2 = ( x - 5 )2 + ( 2x + 1 )2 - ( x2 - 2x ) + ( x - 1 )2
3) ( x - 5 ) ( x + 5 ) - ( x - 2 )3 - 7x2 + ( x + 1 )( x2 - x + 1 ) = ( x + 3 )3 - ( x3 + 9x2 )
4) ( x - 6 )( x2 + 6x + 36 ) - ( x + 4 )3 = ( x - 2 )3 + ( x + 5 )( x2 - 10x + 25 ) - ( 2x3 + 6x2 )
5) ( 2x + 3 )3 - ( 2x + 5 )( 4x2 - 10x + 25 ) = ( 6x - 1 )2 - ( x - 2 )( x2 + 2x + 4 ) + x3
CÁC BẠN GIẢI NHANH CHO MÌNH NHA . BẠN NÀO GIẢI CHI TIẾT NHANH , ĐÚNG MÌNH TICK CHO.
chứng minh biểu thức sau kg phụ thuộc vào x
1. A= 3 ( x+1)2 - (x+3)2
2. B= ( x-2)2 - (x-4)x
3. C= 3. ( x+2) 2 -3 ( x2-4x)
4. D= 3x( x-2) (x+2) -x(3x+3)
5. E=x2 -(x+1) (x-1) +5
6. F=( 3x+2)2 -(3x+2) (3x-2) -6x
7. G= (3x+5)2 - (2x-3)2 + 3( 6x-7)
8. H=( x+5)2 -x(x-5) -10x
9. J= (2x+1)2 +(-x-1)2 -4(x-1)(x+1)
10. R= (x+2)2 ( x+3)2 -2( 5x+1)