Question

resolva as equações do 2°grau

a) 2x²-800=0

b) x²+6x+5=0 ​

Answer 1

Resposta:a)2x²=800

x²=400

x= + - sqrt(400)

x= + -20

a = 1 ; b = 6 ; c = 5

Delta = b² - 4ac

Delta = (6)² - 4(1) (5)

Delta = 36 - 20

Delta = 16b)