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bài 2: Tìm x,biết :(cách làm nữa nhé )
a) 9x2 -49=0
b)(x+3)(x2 -3x+9)-x(x-1)(x+1)-27=0
c) (x-1)(x+2)-x-2=0
d)x(3x +2)+( x+1)2 -(2x-5)(2x+5) = 0
e) (4x+1)(x-2)-(2x-3)(2x+1)=7
TÌM X(3x+2)(2x+9)-(6x+1)(x+2)=7(x-2)(x+5)-(x+3)(x+2)=-63(2x-1)(3x-1)-(2x-3)(9x-1)=0
Xem chi tiết
Bai1:tìm x biết.
a)4×(x-5)-(x-1)×(4x-3)=5
b) (3x-4)×(x-2)=3x×(x-9)-3
c)(x-5)×(x-4)-(x+1)×(x-2)=7
d)(2x-1)×(x-2)-(x+3)×(2x-7)=3
Rút kinh nghiệm, chỉ có từng này thôi
Tìm x
(2x-1)2-4x2+1=0
3x(x+5)-2x-10=0
4(2x+7)2-9(x+3)2=0
a) 2(x-1)2+(x+3)2=3(x-2)(x+1)
b) (x-1)2+(x-2)2=2(x+4)2-(22x+27)
c) x3-5x2+12x-5=0
d) (2x-1)2+(x+3)2-5(x+7) (x-7)=0
Tìm x:
a) 3 x (12x - 4) - 9 x (4 x - 3) = 30
b) x (5 - 2x) + 2x (x - 1) = 15
1)tim x
a)(x-2)(2x+3)=0 b)x^2-6x+9=0 c)x^2-(x+1)^2=0
d)x(2x-4)-2x(x+3)=20 e)3x(x-4)+12x-48=0 f)4x^2+4x= -1
g)(2x-3)^2+(x-3)(2x+3)=0
tìm x
a.(2x-5)^2=49
b.(2x+5)^2-(1-2x)^2=10
c.(9-2x)^3=27
giai PT
a,(y-1)2=9
b,(x-4)2-25=0
c,(x-3)2-(x-1)2=0
d,(3x-7)2-4(x+1)2=0
e,2x(x-5)-x(2x+3)=26
f,5x(x-1)=x-1
g,x3+2x-3=0
h,x3-5x2+8x-4=0
i,x3-7x+6=0
k,x3-9x2+6x+16=0