Question

Evaluate the expression when a=8.

a²-9=?

Answer 1

`\implies {\blue {\boxed {\boxed {\purple {\sf {55}}}}}}`

`\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}`

`{a}^(2) - 9`

Substituting the value "
`a = 8`" in the above expression, we have

➺
`\: {8}^(2) - 9`

➺
`\: (8 * 8) - 9`

➺
`\: 64 - 9`

➺
`\: 55`

`\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{❦}}}}}`

Answer 2

(a-3)(a+3) is the answer