Question

Simplify
a) (4+√5) (4+√5)

Answer 1

Answer: 21 + 8√5

Explanation:

(4+√5) (4+√5) >FOIL

16 + 4√5 + 4√5 + √5√5 >combine like terms

16 + 8√5 + 5

21 + 8√5

Answer 2

8√5+21

Explanation:

Simplify the given expression.

(4+√5) (4+√5)

Start by distributing, using F.O.I.L. (First, outer, inner, last).

(4+√5) (4+√5)

=> 4(4)+4(√5)+√5(4)+√5(√5)

Simplify what's above.

4(4)+4(√5)+√5(4)+√5(√5)

=> 16+4√5+4√5+5

=> 8√5+21

Thus, the given expression has been simplified.