How do you do this math problem up above ?

Is the square root of 4 plus the square root of 16 rational?

Use the formulas a = x 2 – y 2, b = 2xy, c = x 2 + y 2 to answer this question. one leg of a right triangle has length 11 and all sides are whole numbers. find the lengths of the other two sides. the other leg = a0 and the hypotenuse = a1

Which expression is equivalent to -12(3x-3/4)