Question

PLS ANSWER QUICK! Thanks!

Answer 1

The correct answer would be
`a=√(c^2-b^2)`

Explanation:

given
`a^2+b^2=c^2` we want to solve for a

How?

We can do this by using basic algebra ( isolating the variable (a ))

Step 1 subtract
`b^2` from each side

`a^2+b^2-b^2=a^2\\c^2-b^2=c^2-b^2`

now we have
`a^2=c^2-b^2`

step 2 take the square root of each side

`√(a^2) =a\\√(c^2-b^2) =√(c^2-b^2)`

we're left with
`a=√(c^2-b^2)`

Hence your answer is A