Question

2x ao quadrado menos 98 igual a zero

Answer 1

Olá, M4th3us1!

2x² - 98 = 0
a = 2
b = 0
c = -98

Δ = b² - 4.a.c
Δ = 0² - 4.2.(-98)
Δ = 0 + 784
Δ = 784

x = -b +- √Δ / 2.a
x = -0 +- √784 / 2.2
x = -0 +- 28 / 4

x' = -0-28/4 = -28/4 = -7
x'' = -0+28/4 = 28/4 = 7

S = {-7, 7}

Answer 2

2x^2-98=0
2x^2=0+98
2x^2=98
x^2=98/2
x^2=49
x= raiz de 49
x=-/+ 7