Ok so let’s call the 30 a and call the 24 b.
So;
a = 30
b = 24
Find x
Formula;
a square + b square = c square
The c in this case is x.
So we are gonna transpose to make x the subject.
a square + b square = c square
x square = a square - b square
Now that x is the subject we are gonna solve for x.
x square = (30 square) - (24 square)
x square = 900 - 576
x square = 324
Now we are gonna find the square root of both sides.
x square = 324
x = 18
The square root of x square is x and the square root of 324 is 18.
Therefore x = 18