Question

resolva a equação

x (x + 2 ) = 2x + 25​

Answer 1

x(x + 2) = 2x + 25

x² + 2x = 2x + 25

x² + 2x - 2x - 25 = 0

x² - 25 = 0

x² = 0 + 25

x² = 25

x= ± √25

x= ± 5

S= ( 5 , - 5)