Question

Tolong no 8 & 9 mksh

Answer 1

Verified answer

Jawab

8.
(y⁻¹. + x y⁻²) /(1 - x² y⁻² ) = 

kalikan dengan y²/y²

= y² (y⁻¹ + xy⁻²) / y² (1 - x² y⁻²)

= ( y  + x) / ( y² - x²)

= (y + x) /(y + x)(y  -x)

= 1/ (y  - x)
jawab A

9.

( √45 + √18)/ (√(√7 + 2√10)) =

= (3 √5  + 3√2 )/ (√ (√5 + √2)²

=  3 (√5 + √2) / (√5 + √2)

= 3