Question

Can you please explain the answer to me ​

Answer 1

`b=√(7)`

Explanation:

When we solve for this we should always remember this formula
`a^2+b^2=c^2` and since we already know a and c we can plug that in to find out what b could be but we won't actually solve it.

`a^2+b^2=c^2\\3^2+b^2=4^2\\9+b^2=16\\b^2=7\\√(b^2)=√(7)\\b=√(7)`

So b would equal whatever the square root of 7 is.