Answer:
11
Step-by-step explanation:
Using the Quadratic formula
x^4 = (x^2)^2
hence
(x^2)^2 + 4x +(-1) = 0
ax^2=1(x^2)^2
bx = 4(x)
c=(-1)
16
20 - 4 = 16
~CoCo❤
y= -2x+2
