could someone help me with math?

Question

Evaluate the expression (x+2)^2= and the expression x^2+4x+4= for x=2

a. (x+2)^2 = ____
b. x^2+4x+4= ____

Answer 1

 substitute the given vlue x = 2 for teh variable x in each expression.

 

(2+2)² = 4² = 16

 

 

(2)² + 4(2) + 4 = 4+ 8 + 4 = 16

 

which is not surprising, given that (x+2)² = x² + 4x  = 4