Tìm x:
2x(x-5)-x(3+2x)=26
Tìm x, biết: 2x(x – 5) – x(3 + 2x) = 26.
Ta có: 2x(x – 5) – x(3 + 2x) = 26
⇔ 2 x 2 – 10x – 3x – 2 x 2 =26
⇔ - 13x = 26
⇔ x = - 2
tìm x:
a) x(2x - 3) - 2(3-2x) = 0
b) 2x(x - 5) - x(3+2x) = 26
x(2x - 3) - 2(3 - 2x) = 0
x(2x - 3) + 2(2x - 3) = 0
(2x - 3)(x + 2) = 0
\(\left[\begin{array}{nghiempt}2x-3=0\\x+2=0\end{array}\right.\)
\(\left[\begin{array}{nghiempt}x=\frac{3}{2}\\x=-2\end{array}\right.\)
2x(x - 5) - x(3 + 2x) = 26
2x2 - 10x - 3x - 2x2 = 26
- 13x = 26
x = - 26 : 13
x = - 2
Tìm x, biết: 2x(x – 5) – x(3 + 2x) = 26.
Ta có: 2x(x – 5) – x(3 + 2x) = 26
⇔ 2x2 – 10x – 3x – 2x2 =26
⇔ - 13x = 26
⇔ x = - 2
Tìm x
2x(x-5)+x(3+2x)=26
2x(x-5)+x(3+2x)=26
2x2-10x+3x+2x2=26
4x2-7x=26
x(4x-7)=26
... (tự lập bảng tìm tiếp)
2x(x-5)+x(3+2x) = 26
<=> 2x2 -10x + 3x + 2x2 = 26
<=> 13x = 26
<=> x = 2
Tìm x , biết
2x(x-5)-x(3+2x)=26
\(2x\left(x-5\right)-x\left(3+2x\right)=26\)
\(\Leftrightarrow2x^2-10x-3x-2x^2=26\)
\(\Leftrightarrow-13x=26\)
\(\Leftrightarrow x=-2\)
Bài làm:
Ta có: \(2x\left(x-5\right)-x\left(3+2x\right)=26\)
\(\Leftrightarrow2x^2-10x-3x-2x^2-26=0\)
\(\Leftrightarrow-13x=26\)
\(\Rightarrow x=-2\)
2x( x - 5 ) - x( 3 + 2x ) = 26
<=> 2x2 - 10x - 3x - 2x2 = 26
<=> -13x = 26
<=> x = -2
Tìm x, biết 2x(x-5) - x (3+2x) = 26
2x(x-5) - x(3+2x) = 26
<=> 2x^2 - 10x - 3x - 2x^2 = 26
<=> -13x=26
<=> x = -2
2x(x-5) - x (3+2x) = 26
=> 2x2 - 10x - 3x - 2x2 = 26
=> (2x2 - 2x2) + (-10x - 3x) = 26
=> -13x = 26
=> x = 26 : (-13)
=> x = -2
2x(x-5)-x(3+2x)= 26
2x2-10x-3x-2x2= 26
-13x = 26
x = -2
TÌM X BIẾT:
2x(x - 5) - x(3+2x) = 26
Tìm x
2x(x - 5 ) - x(3+2x) = 26
Giúp mik
2x(x - 5 ) - x(3+2x) = 26
2x2-10x-3x+6x=26
2x2-7x=26
x.(2x-7)=26
Chỗ đây bn tự liêt kê ra nha
\(\Leftrightarrow2x^2-10x-3x-2x^2=26.\)
\(\Leftrightarrow-13x=26\Rightarrow x=-2\)
2x(x-5) -x(3+2x) = 2x2 -10x -3x -2x2 = 26
-13x =26
x = -2
Tìm x :
a) ( x + 2 ) ( x + 3 ) - ( x - 2 ) ( x + 5 ) = 0
b) 2x ( x -5 ) - x ( 3 + 2x ) = 26
~ Help
a) ( x + 2 ) ( x + 3 ) - ( x - 2 ) ( x + 5 ) = 0
x2 + 3x + 2x + 6 - x2 + 5x - 2x - 10 = 0
8x - 4 = 0
8x = 0 + 4
8x = 4
x = 4 : 8
x = 1/2
b) 2x ( x -5 ) - x ( 3 + 2x ) = 26
2x2 - 10x - 3x - 2x2 = 26
-13x = 26
x = 26 : (-13)
x = -2