Question

SHOW YOUR WORKING. ANSWER PROPERLY. ANSWER IF YOU ONLY KNOW. ATTACHED

Answer 1

see explanation

Explanation:

evaluate both sides of the question and compare

left side

5a² - 9(b - a) +
`(2)/(b^(5) )` + 7ab ← substitute a = - 2 , b = - 1

=5(-2)² - 9(- 1 - (- 2) ) +
`(2)/((-1)^(5) )` + 7(- 2)(- 1)

= 5(4) - 9(- 1 + 2) +
`(2)/(-1)` + 7(2)

= 20 - 9(1) - 2 + 14

= 20 - 9 - 2 + 14

= 11 + 12

= 23

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right side

-
`(5a)/(b)` - 6a³ -
`(ab)^(4)` +
`(9)/(b^2-a^3)` ← substitute a = - 2 , b = - 1

= -
`(5(-2))/(-1)` - 6(- 2)³ -
`(-2)(-1)^(4)` +
`(9)/((-1)^2-(-2)^3)`

=
`(10)/(-1)` - 6(- 8) -
`(2)^(4)` +
`(9)/(1-(-8))`

= - 10 + 48 - 16 +
`(9)/(1+8)`

= 38 - 16 +
`(9)/(9)`

= 22 + 1

= 23

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thus both sides are equal when a = - 2 and b = - 1