Question

qual resultado da equacao 4x(x+6)-xao quadrado =5xao quadrado

Answer 1

4x.(x + 6) - x² = 5x²
4x² + 24x - x² = 5x²
3x² + 24x = 5x²
- 5x² + 3x² + 24x = 0
- 2x² + 24x = 0
x(- 2x + 24) = 0

x = 0

- 2x + 24 = 0
- 2x = - 24 (-1)
2x = 24
x = 24/2
x = 12

R.: x = 0 e x = 12

Answer 2

4 x (x + 6 ) - x²  =  5 x²
4 x² + 24 x - x² = 5 x²
4 x² - x² - 5 x² + 24 x = 0
4 x² - 6 x² + 24 x = 0
-2 x² + 24 x = 0
2 x ( -1 x + 12) = 0
2 x = 0
x = 0/2
x = 0
-1 x + 12 = 0
-1 x = -12
x = -12/-1
x = 12

S = {0 , 12}