Question

Diketahui f(x) = 2x² - 3 hasil f(a-1)

Answer 1

F(a-1)=2(a-1)^2-3 =2(a-1)(a-1)-3 =2(a^2-a-a+1)-3 =2(a^2-2a+1)-3 =2a^2-4a+2-3 =2a^2-4a-1