Question

if+a=3+√7/2+then+find+the+value+ofA2+1/A2

Answer 1

Answer:9+√7/2

Step-by-step explanation:

2a+1/2a

=2(3+√7/2)+1/2(3+√7/2)

=3+√7+1/3+√7

=3+√7+3-√7/2  ,since we factorized 1/3+√7

                           (1/3+√7)×(3-√7/3-√7)

                            3-√7/(3)²-(√7)²,because (a+b)(a-b)=a²-b²

                            3-√7/2

=[2(3+√7)+(3-√7)]/2

=[6+2√7+3-√7]/2

=9+√7/2