Question

using identity find the squares of 5 +2root3​

Answer 1

Answer:

(5+2√3)² = 25 + 12 + 20√3 = 37+20√3

using(a+b)² = a²+b²+2ab

Answer 2

Answer:

510

2

=(500+10)

2

It is the form of (a+b)

2

, where a=500,b=10

Applying the formula (a+b)

2

=a

2

+b

2

+2ab

510

2

=(500+10)

2

=500

2

+10

2

+2×500×10=250000+100+10000=260100