simplifying with radicals

Question

In Algebra 1 I am given the following problem:

 

Simplify: (7 - √5)²

Please help me.

Answer 1

You need to multiply (7 - √5) using FOIL then combine all like terms. 

 

(7 - √5)^2 = 

(7 - √5)(7 - √5) =

49 - 7√5 - 7√5 + 5 =

54 - 14√5

 

 

Have a great evening!

Colossians 3:23

Answer 2

Expand this, James.

 

(7 - √5)² = (7 - √5)(7 - √5)

 

= 49 - 7√5 - 7√5 + 5   by the FOIL method

 

= 54 - 14√5