Question

someone tell me the answer to this been trying for awhile. Complete the square for the expression. Write the resulting expression as a binomial squared.
x^2 + 4x + ___

Answer 1

= (x + 2)^2

Answer 2

so is the blank for the last + 4 or 16?

Answer 3

x^2 + 4x + ___
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Take half the coefficient of the x term and square it.
That's what you need for the blank.
Note:
so is the blank for the last + 4 or 16?
Answer: No for 16.