Answer:
x^2 + 8x + 16
Step-by-step explanation:
x^y
an exponent is the the value of x, multiplied by x, for y times.
so, (x+4)^2 is the same as (x+4)*(x+4). Then you just simplify using FOIL.
F-first x*x = x^2
O-outer x*4 = 4x
I-inner 4*x = 4x
L-last 4*4 = 16
Now, you've got your quadratic equation. x^2 + 8x (because 4x+4x=8x) + 16
Answer:
x²+8x+16
Step-by-step explanation:
(x+4)² = (x+4) (x+4) = x² + 4x +4x + 16
= x²+8x+16
You can also use (a+b)² formula for expansion
(a+b)² = a² + 2ab + b²
