Question

Jika f(x-1) = x²+x-1 maka f(x+1) sama dengan

Answer 1

X-1 = y
x = y+1
x+1 = y+1+1
x+1 = y+2
x+1 → x+2

f(x-1) = x²+x-1
f(x+1) = (x+2)²+(x+2)-1
f(x+1) = x²+4x+4+x+1
f(x+1) = x²+5x+5