Question

Question

Consider this expression.
4/2² - 6²
Type the correct answer in the box. Use numerals instead of words. For help, see this worked example e.
When a =
-5 and b = 3, the value of the expression is
Submit

Answer 1

`\Large \boxed{16}`

Explanation:

`4√(a^2-b^2 )`

`\sf Plug \ in \ the \ values \ for \ a \ and \ b.`

`4√(-5^2-3^2 )`

`4√(25-9 )`

`4√(16)`

`4 * 4=16`

Answer 2

16

Explanation:

4 * sqrt( a^2 - b^2)

Let a = -5 and b =3

4 * sqrt( (-5)^2 - 3^2)

Do the squaring first

4 * sqrt( 25 - 9)

Subtract inside the square root

4 * sqrt( 16)

Take the square root

4 * 4

Multiply 16