Question

a) x² - x - 6 = 0
b) x² - 7x + 10 = 0

Answer 1

x² - x - 6 = 0
delta = 1 +24 = 25 ou +-V25 = +-5 ***

x = ( 1 +-5)/2
x1 = 6/2 = 3 ***
x2 = -4/2 = -2 ***

b
x² - 7x + 10 = 0
delta = 49 -40 = 9 ou V9 = +-3 ****

x = ( 7 +-3)/2
x1 = 10/2 = 5 ****
x2 = 4/2 = 2 ****

Answer 2

Fala, Jocimar.

a) x²-x-6=0
∆ = (-1)²-4.1.(-6)
∆ = 1+24 = 25 = 5²

x = -(-1)±√5²/2

x = (1±5)/2—› x=3 ou x=-2

b) x²-7x+10 =0
∆= (-7)²-4.1.10
∆= 49-40 = 9 = 3²

x = -(-7)±√3²/2

x = (7±3)/2—›x=5 ou x=2

espero ter ajudado, abs