<=> 2x2 - 3x+ 4x - 6 - 2x2+10 =12
<=> -3x + 4x = 12 -10 + 6
<=> x = 8
= > 2x2 - 3x + 4x- 6- 2x2+10x = 12
= -3x+4x+10x =12+6
= 11x = 18
= x = 18 /11
Tìm x
a) (12x-5)(3x-1)-(18x-1)(2x+3)=5
b) (x+2)(x-3)-(x-2)(x+5)=2(x+3)
c) (2x+3)(2x-1)-(2x+5)-(2x-3)=12
Tìm x biết
a) (x+2).(x+3) - (x-2).(x+5)=10
b) (3x+2). (2x+9) - (x+2). (8x+11)=(x+1).(3-2x)
c) 3.(2x-1).(3x-1)-(2x-3).(9x-1)=0
d) (5x-8).(4x-5)-(3x-4).(2x+12)=12
Tìm x biết:
a) 2x(3x+1) – (2x+3)(3x-2) = 12
b) (x+2)2 – (x-3)(x+3) = 5
Tìm x:
a)x(2x-4)-(x-2)(2x+3)
b)x(3x+2)+(x+1)^2-(2x-5)(2x+5)=-12
c)(x-1)(x^2+x+1)-x(x-3)^2=6x^2
d)x^2-x=0
e)(x+2)(x-3)-x-2=0
f)3x^3-27x
tìm x biết
câu 9 :x ³-2x ²-x+2=0
câu 10 :x ³-2x ²-x+2=0
câu 11 :x ²+4x-5=0
câu 12 :2x ²+4x+2=72
câu 13 :x(x-5)(x+5)-(x+2)(x ²-2x+4)=17
câu 14 :2x ³+5x ²-12x=0
Tìm GTNN của biểu thức A=|x-7|+|x-5| B=(2x-1)^2-3|2x-1|+2 C=|x^2+x+1|+|x^2+x-12|?
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 , biết : x ( 3x + 2 ) + ( x + 1 )2 – ( 2x – 5 )( 2x + 5 ) = – 12
Tìm x , biết : x ( 3x + 2 ) + ( x + 1 )2 – ( 2x – 5 )( 2x + 5 ) = – 12
