Question

Rezolvați ecuatiile : 5 ori 2x+1/3 - x-3/9 = x+2/6 + 3x-1/3
2x + 3 - 2x + 3/2 - 2x + 3/3 = 2x +3 /6
x√2 =2
x√7 + 3√5 = 3√7 + x√5
( x + √3)² - ( x + √3) ( x-√3) = 0
x√2 + 1 = x+√2
√3(x-1) - √5(x+2)= x-3√3 +2
2( 3x-1) - 3( x+ √3) = √3(2-3x) -7
(x+1)² - (x-1)²= (2x+1)² - 4x²
(x+1)² + (x+2) ² + (x+3) ² + (x+4)²= (2x+4)²

Answer 1

5 × 2x+1/3 - x-3/9 = x+2/6 + 3x-1/3
10x+3/9 - x-3/9 = 4x+2/6 -2/6
5x =0
x=0


2x + 3 - 2x + 3/2 - 2x + 3/3 = 2x +3 /6
+ 3  + 3/2 - 2x + 1 = 2x +1 /2
4+3/2-1/2=4x
(8+3-1)/2=4x
10/2=4x
x=5/4


x√2 =2
x=2/√2=√2

x√7 + 3√5 = 3√7 + x√5
x√7 - x√5 = 3√7 - 3√5
x(√7 - √5) = 3(√7 - √5)
x=3

( x + √3)² - ( x + √3) ( x-√3) = 0
 x²+2x√3 + 3 -  x² - 3 = 0
2x√3  = 0
x=0

x√2 + 1 = x+√2
x√2-x = √2-1
x(√2-1)= √2-1
x=1

√3(x-1) - √5(x+2)= x-3√3 +2
x√3-√3 - x√5-2√5= x-3√3 +2
x√3 - x√5-x=-3√3 +2+√3+2√5
x(√3 -√5-1)=-2√3 +2+2√5
x(√3 -√5-1)=-2(√3 -√5-1)
x=-2

2( 3x-1) - 3( x+ √3) = √3(2-3x) -7
6x-2 - 3x-3√3 = 2√3-3√3x -7
3x +3√3x = 2√3 -7+2+3√3
3x +3√3x = 5√3 -5
3x(1+√3)=-5(1-√3)
x=-5(1-√3)/3(1+√3)


(x+1)² - (x-1)²= (2x+1)² - 4x²
x²+2x+1 - x²+2x-1= 4x²+4x+1 - 4x²
+1 -1≠ +1   multime vida

(x+1)² + (x+2) ² + (x+3) ² + (x+4)²= (2x+4)²
x²+2x+1 + x²+4x+4  + x²+6x+9  +x²+8x+16 = 4x²+16x+16
20x+14 =16x
4x=-14
x=-7/2