Question

qual o valor do delta e o x1 linha e x2 linhas: X(X+3)=5X+15

Answer 1

Resposta:

x.(x+3)=5x+15

x²+3x=5x+15

x²+3x-5x-15=0

x²-2x-15=0

x²+3x-5x-15=0

x.(x+3)-5(x+3)=0

(x+3).(x-5)=0

x+3 =0

x-5 =0

x1 = -3. x2 = 5