Question

x^2+14x+?

Answer 1

What are you trying to do?

Answer 2

Completing a square?

Answer 3

\[x^2+14x+?=x^2+2\cdot7\cdot x+?\Rightarrow ?=7^2=49\]

Answer 4

complete the square for the expression. then write the resulting expression as a binomial squared. ?

Answer 5

Once you get the number, it should be easy write the expression,
\[x^2+2\cdot7\cdot x+7^2=(x+7)^2\]

Answer 6

wow, thanks so much!

Answer 7

You're welcome.