Fungsi g(x) = 2x2 - 5 tentukan. A) nilai fungsi untuk x = 2 dan x= -2. B) nilai n jika g(n) = 3

g(x) = 2x² - 5

A) x = 2 dan x = -2
g(2) = 2(2)² - 5 = 8 - 5
g(2) = 3

g(-2) = 2(-2)² - 5
g(-2) = 8 - 5
g(-2) = 3

B) g(n) = 3
g(n) = 2n² - 5 = 3
2n² = 8
n² = 4
n = √4
n = 2 atau n = -2