The product of x cubed and 6, minus 4
Pairs
(6x – 4)3
(6x)3 – 4
4 less than 6x, cubed
6x3 - 4
6(x - 43
the difference of x and 4, cubed, times 6

Since the triangle is a right triangle, you can use the Pythagorean Theorem to find the length of the hypotenuse.
The Pythagorean Theorem: a² + b² = c², where c is the hypotenuse of the triangle.

Plug in the leg lengths and solve.

    a² + b² = c²
    3² + 4² = c²
    9 + 16 = c²
          25 = c²
            5 = c

The length of the hypotenuse is 5 ft.