Question

if a=5 and b=4 then find the value of asquare -bsquare​

Answer 1

25-16=9 is the answer

Answer 2

Step-by-step explanation:

a= 5+2√6

1/a= 1/(5+2√6)

multiplying with comgugates,

1/a = (5-2√6)/{(5+2√6)(5-2√6)

1/a = (5-2√6)/{5² -(2√6)²}

1/a = (5-2√6)/{25 - 24}

1/a = 5-2√6

Refer to attachment.

identities used

a²-b² = (a+b)(a-b)