Question

Plz solve the questions.....
STEP BY STEP

Answer 1

ab=7

=a=7/b

=a^2+b^2=5

=(7/b)^2+b^2=5

=49/b^2+b^2=5

=49+b^4/b^2=5

=b^2=5-49

=b=√45

therefore a=7/45

a^2-b^2

(7/45)^2-(√45)^2

45/2025-45

1/45-45

1-2025/45

-2024/45