Question

Which shows all the values of a that makes the rational expression 3a^2-27 /324-4a^2 unidentified

Answer 1

a=+-9

Explanation:

Answer 2

a = ± 9

Explanation:

The denominator of the rational expression cannot be zero as this would make it undefined. Equating the denominator to zero and solving gives the values that a cannot be

324 - 4a² = 0 ( subtract 324 from both sides )

- 4a² = - 324 ( divide both sides by - 4 )

a² = 81 ( take the square root of both sides )

a = ±
`√(81)` = ± 9 ← excluded values