Các câu hỏi tương tự
: Tìm x, biết:
a) 3x( 4x- 1) - 2x(6x- 3 )30 b) 2x(3-2x) + 2x(2x-1)15
c) (5x-2)(4x-1) + (10x +3)(2x - 1)1 d) (x+2) (x+2)- (x -3)(x+1) 9
e) (4x+1)(6x-3) 7 + (3x – 2)(8x + 9) g) (10x+2)(4x- 1)- (8x -3)(5x+2) 14
Đọc tiếp
: Tìm x, biết:
a) 3x( 4x- 1) - 2x(6x- 3 )=30 b) 2x(3-2x) + 2x(2x-1)=15
c) (5x-2)(4x-1) + (10x +3)(2x - 1)=1 d) (x+2) (x+2)- (x -3)(x+1) = 9
e) (4x+1)(6x-3) = 7 + (3x – 2)(8x + 9) g) (10x+2)(4x- 1)- (8x -3)(5x+2) =14
tìm x ;
a , | x | + | x + 2 | = 3
b , | 2x + 1 | + | x + 8 | = 4x
c, | 3x + 5 | + | 3 - 3x | = 2x - 1
d , | 2x - 1 | - | 3x - 3 | = 2x - 5 +( x - 2)
e , | 3x - 1 | + | x - 2 | = 2x + 3
BT: Tìm nghiệm của đa thức
A. A(x)=4x-1. E. F(x)=5-x^2.
B. B(x)=2x^2-8. F. B(x)=(1/2-x)×(2x+1).
C. C(x)=x^2+1. G. C(x)=3x^2-x.
D. D(x)=(3x-2)×(2x-3). H. D(x)= 1/2x^2+x^3
GIÚP MK VS NHA
Tìm x biết :
a, 4.(18 - 5x) - 12.(3x - 7) = 15.(2x - 16) - 6(x + 14)
b, 5.(3x + 5) - 4.(2x - 3) = 5x + 3.(2x + 12) + 1
c, 2.(5x - 8) - 3.(4x - 5) = 4.(3x - 4) + 11
d, (3x + 2)(2x + 9) - (x + 2)(6x + 1) = (x + 1) - (x - 6)
e, (8x - 3)(3x + 2) - (4x + 7)(x + 4)= (2x + 1)(5x - 1) - 33
Bài 2 Tìm x biết 1, (2x-2).(3x+1)-(3x-2).(2x-3)=5 2,(1-3x).(3x-5)-(2x-4)(2-3x)=x-6 3,(2x-1).(4x^2+2x+1)-(2x+1)(4x^2-2x+1)=5x+6 Giúp tớ với
B1:tìm x biết a, (-2+x^2)(x^2-2)(x^2-2)(x^2-2)(x^2-2)=1 b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4) c,(8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1) d, 2x^2+3(x-1)(x+1)=5x(x+1) e, (8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x) f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
Bài 1:
a, (-2+x\(^2\))(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)(x\(^2\)-2)=1
b, (2x+3)(x-4)+(x-5)(x-2)=(3x-5)(x-4)
c, (8x-3)(3x+2)-(4x+7)(x+4)=(4x+1)(5x-1)
d,2x\(^2\)+3(x-1)(x+1)=5x(x+1)
e,(8-5x)(x+2)+4(x-2)(x+1)=(2+x)(2-x)
f, 4(x-1)(x+5)-(x+2)(x+5)=3(x-1)(x+2)
thu gọn biểu thức
a, 3x*(x+2)+4x*(-2x+3)+(2x-3)*(3x+1)
b,(x2+1)*(x2-x+2)-(x2-1)*(x2+x-2)
c,(-2x-3)2+(3x+2)2+(4x+1)
Tìm nghiệm các đa thức:
a) -3x^3+5x^2-2x
b) -1/2x^4+1/8x^2
c)-1/3(3x+1)(5-2x)(2013x-2012)
d)3x^2-x-10
e)x^2-4x+3
cm đa thức ko có nghiệm
a)x^2+x-1
b)2013x^2012+1
c)4x^2-4x+3