Question

please solve this question​

Answer 1

a=2+✓5/2-✓5

b=a+✓5/2-✓5

solutions...

squaring both sides

a²=2²-✓5²/2²+✓5²

a²=4-5/4+5

a²=-1/9

b=a+✓5/2-✓5

squaring

b²=a²+5/4-5

b²=a²+5/-1

b²=-a²-5

now according to question

=a²-b²

=(-1/9) - (-a²-5)

=-1/9 + a²+5

LCM

=-1+a²+5*9/9

=-1+9a²+45

=9a²-44