Question

] The square root of ( 10 + 5√3 )(10 - 5√3 )
a) √5 b) 10 c) 5 d) 25

Answer 1

Answer:

c) 5

Step-by-step explanation:

( 10 + 5√3 )(10 - 5√3 ) = 25

square root of 25 = 5

Answer 2

Answer:

Using the identity,

(a + b)(a - b) = a² - b²,

We get, (10 + 5$\sqrt{3}$)(10 - 5$\sqrt{3}$) = 100 - 75 = 25

The square root of (10 + 5√3)(10 - 5√3) = $\sqrt{25}$ = 5