Ôn tập toán 8
Các câu hỏi tương tự
bai1.tim x biet:
a,(x+2).(x+3)-(x-2).(x+5)=0
b,(2x+3).(x-4)+(x-5).(x-2)=(3x-5).(x-4)
c,(8x-3).(3x+2)-(4x+7).(x+4)=(2x+1).(5x-1)=33
Tim x biết
a)2x(x-5)-x(3+2x)=26
b)5x(x-1)=x-1
C)2(x+5)-x^2-5x=0
d)(2x-3)^2(x+5)=0
e)3x^3-48x=0
f)x^3+x^2-4x=0
Tìm x :
a) x ( x - 1 ) - x^2 + 2x = 5
b) 4x ( 3x + 2 ) - 6x ( 2x + 5 ) + 21 ( x - 1 ) = 0
c) 2x( x + 1) - x^2 ( x + 2 ) + x^3 - x + 4 = 0
tim x: a.4/(x^2+2x+1)+3/(x^2+2x+3)=3/2
b.4x/(x^2+4x+5)+7x/(x^2-4x+5)=39/10
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,biết :
a) 2x^2-7x+5=0
b) x(2x-5) - 4x+10=0
c) (x-5)(x+5) - x(x-2)=15
d) x^2(2x-3) - 12+8x=0
e) x(x - 1)+5x - 5=0
f) (2x-3)^2 - 4x(x - 1)=5
g) x(5 - 2x)+2x(x - 1)=13
h)2(x+5)(2x - 5)+(x - 1)(5 - 2x)=0
Tìm x :
a) x(x - 4 ) - ( x^2 - 8 ) = 0
b) ( 3x + 2 )( x - 1 ) - 3( x + 1 )( x - 2 ) = 4
c) x( x + 5 )( x - 5 ) - ( x + 2 )( x^2 - 2x + 4 ) = 17
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
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