Question

responda pra mim equaçao do 2 grau

Answer 1

5x² + 7x = 3x² + 2x  
5x² + 7x - 3x² - 2x = 
2x² + 5x = 0

bhaskara

b² - 4ac
-5² - 4.2.0
25 = delta 

-b +/- √Δ / 2a
-(-5) +/- √25 / 2.2
5 +/- 5 / 4

x1 = 5+5/4 = 10/4 = 5/2
x2 = 5-5/4 = 0/4 = 0

Bons estudos

Answer 2

5x² + 7x = 3x² + 2x

5x² -3x² + 7x - 2x = 0

2x² + 5x = 0

x. ( 2x + 5) = 0

x = 0        ou     2x + 5 = 0
                         2x = -5
                           x = -5/2

portanto    :

x' = 0

x" = -5/2