\(\left(2-4x\right)\left(x+3\right)-4x\left(5-x\right)=0\)
\(\Leftrightarrow-4x^2-10x+6+4x^2-20x=0\)
\(\Leftrightarrow-30x+6=0\)
\(\Leftrightarrow-6\left(5x-1\right)=0\)
\(\Leftrightarrow x=\dfrac{1}{5}\)
Tìm x
x^2 - 4x = 0
4x^2 - 9 = 0
2x ( x - 3 ) + 5( x - 3 ) = 0
x ( 2x + 9 )- 4x - 18
( 2x - 1 )^2 - ( x + 2 )^2 = 0
Tìm x
a) (x + 3)2 + (x + 2)(5 – x) = 1
b/ (2x – 1)2 – ( x – 5)( 4x + 3) = 3
c/ 3x (x – 2) + 4x – 8 = 0
d/ 2x (3x + 5) – 18x – 30 = 0
Tìm x biết
(6-3x)^2-2(3x-6)=0(2x+5)^3-(2x+5)=0(6-4x)^3-(6-4x)=0(5-4x)^2-(4x+5)=01) (x^3 - x^2)- 4x^2 + 8x - 4 = 0
2) 2x^3 - 50x = 0
3) (x + 1) = ( x + 1)(x - 1)
4) ( 3x+1)^2-4(X-3)^2=0
5)(X+3)(X^2-5X+9)-X^3=2X
6) (4X+3)^2-(4X-3)^2-5X-2=0
7)(X-1)^3-(X-3)(X^2+3X+9)-3X(2-X)=5
tìm x biết
1, x mũ 3 + 4x mũ 2 + 4x = 0
2, ( x + 3 ) mũ 2 - 4 = 0
3, x mũ 4 - 9x mũ 2 = 0
4, x mũ 2 - 6x + 9 = 81
5, x mũ 3 + 6x mũ 2 + 9x - 4x = 0
a)2x-3/4-4x-5/3=5-x/6
b)3(x-1^2)=16
c)(x+7)(x-4)=2(x-4)
d)4x^2-3x-1=0
mọi người giúp em giải bài này với
tìm x
a)(x-2)2-25=0
b)4x(x-2)+x-2=0
c)4x(x-2)-x(3+4x)
d)(2x-5)2-3x(5-2x)=0
e)x-25-(x+5)=0
f)5x(x-3)-x+3=0
nhé cảm ơn mn
a)9x2 – 49 = 0
b)(x – 1)(x + 2) – x – 2 = 0
c)(4x + 1)(x - 2) - (2x -3)(2x + 1) = 7
d)x(3x + 2) + (x + 1)2 – (2x – 5)(2x + 5) = 0
e)(x + 3)(x2 – 3x + 9) –x(x – 1)(x + 1) – 27 = 0
f)(4x-3)^2-3x(3-4x)=0
.chứng minh rằng
1)4x^2-4x+2>0
2)x^2-4x+10>0
4)9x^2+6X+3>0
5)-x^2-2x-3<0
