Question

X elevado a 2 menos 100 igual a zero

Answer 1

x²-100 = 0
Δ = 0²-4(1)(-100)
Δ = 400

x = -0+-20 / 2

x' = -0-20 / 2 = -20/2 = -10

x'' = -0+20 / 2 = +20/2 = 10

Answer 2

x2 -100 = 0

x2=100
x=√100
x=10