Question

Equação do 2 grau x. (2x-5)=25​

Answer 1

x.(2x-5)=25

2x²-5x= 25

2x²-5x-25= 0

b²-4ac=∆

(-5)²-4.2.(-25)= ∆

25+200= ∆

∆=225

x= (-b±√∆)/2a

x' = [-(-5)+ 15]/2.2

x'= (5+15)/4

x'= 20/4

x'= 5

x" = [-(-5)- 15]/2.2

x"= (5-15)/4

x"= -10/4

x"= -5/2