19. Simplify (-5-√3)^2

asked Sep 22, 2018 213k views

4 votes

by Lujop

6.2k points

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4 votes

(-5-√3)² =
(-5-√3)² . (-5-√3)² =
(-5)² - (-5).√3 - (-5).√3 + (√3)² =
25 + 5√3 + 5√3 + 3 =
25 + 3 + 10√3 =
28 + 10√3 =

Simplify:

2(14 + 5√3)

VnC answered Sep 25, 2018

by VnC

5.9k points

2 votes

Using the FOIL method
-5 × -5 = 25
-5 × -√3 = +5√3
-√3 × -5 = +5√3
-√3 × -√3 = +3
so the answer is 28 +10√3

Shivadarshan answered Sep 28, 2018

5.9k points

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