Question

What number must you add to complete the square?

x2 + 4x = 3

A. 4
B. 8
C. 2
D. 16

Answer 1

hmmm do you know what a "perfect square trinomial" is?

Answer 2

or have you covered that yet?

Answer 3

Definition of a Perfect Square Binomial. A perfect square binomial is a trinomial that when factored gives you the square of a binomial. @jdoe0001

Answer 4

hmmm have you covered it yet? or is that from google?

Answer 5

i have covered it. but its just confusing what the question they are asking @jdoe

Answer 6

well

let's take a peek at \(\bf x^2 + 4x = 3\)

and do some grouping first
so, we end up with \(\bf x^2 + 4x = 3\implies (x^2+4x+{\color{red}{ \square ?}}^2)=3\)

so.. what's our missing value there, to get a perfect square inside the parentheses anyway?