Question

F(x) = 1.1–4x when x = – √2

Answer 1

f(x)=2x^2+4x+6

f(x)=2(x^2+2x)+6

f(x)+?=2(x^2+2x+?)+6

f(x)+?=2(x^2+2x+1)+6

f(x)+2x1=2(x^2+2x+?)+6

f(x)+2=2(x^2+2x+1)+6

f(x)=2(x+1)^2+6-2

f(x)=2(x+1)^2+4

Answer:

f(x)=2(x+1)^2+4