+0

# help

0
41
2
+420

I cant think of how to do this question so some help would be apriciated

What number can be placed in the box, so that the resulting quadratic expression is the square of a binomial?
\(x^2 + 22x + \boxed{\phantom{000}}\)

May 1, 2020

#1
+111329
+2

Take 1/2  of 22  =  11

Square this  = 11^2  =  121

That's what goes into the box

Proof

(x + 11)^2  =

(x + 11)  ( x + 11)  =

x^2  + 22x + 121

May 1, 2020
#2
+420
+2

Wow! I never thought of doing that!

May 1, 2020