Question

How is the answer 6 when I keep getting the answer 9.16

Answer 1

The value of given expression is 6.

Explanation:

Given expression is;

`√(5x^2-(-x^4))`

We have to solve the expression when x = -2

Putting x = -2 in the given expression,

Solution =
`√(5(-2)^2-(-(-2)^4)))\\`

Solution =
`\sqrt{5(4) - (-16)`

Solution =
`√(20+16)`

Solution =
`√(36)`

Taking square root of 36

Solution = 6

Thus,

`√(5x^2-(-x^4))` = 6

Hence,

The value of given expression is 6.