Question

Solve please I’m desperate

Answer 1

16 and 9 must be added as they are under the same root. We get 25 which is a perfect square. Next, 16 and 9 in parentheses are under different roots so they can’t be added. So, get the square root from 16 and 9 separately. This way we get 5-(4+3). Now, combine 5-(7). Next, multiply by - sign. This gives us a negative number. So, we get 5-7. Which equals -2. See the attachment for solving.

Answer 2

-2

Explanation:

`√(16+9)-(√(16)+√(9))`

We are going to use PE(MD)(AS) to evaluate.

We are going to do the operations in the grouping symbol.

A grouping symbol is anything that operations grouped together in it like that first square root.

`√(25)-(√(16)+√(9))`

We can also perform the operation inside the other grouping symbols ().

But it has addition and square roots. The square roots come first then the addition.

Now the square roots can be kind of though as exponents and actually you could think of something like
`√(9)` as
`9^{(1)/(2)}`.

Anyways, this gives us:

`√(25)-(4+3)`

Now the addition inside the ( ):

`√(25)-(7)`

Now we have square root and subtract left. The square root part will come first and then the subtract:

`5-7`

`-2`