5×72-15=0

Add 15 to both sides of the equation.

5×72=15

Divide each term in 5×72=15 by 5.

5×725=155

Simplify 5×725.

Cancel the common factor.

5×725=155

Divide x72 by 1.

x72=155

x72=155

Divide 15 by 5.

x72=3

x72=3

Raise each side of the equation to the 27 power to eliminate the fractional exponent on the left side.

(x72)27=(3)27

Remove parentheses.

x=327

Solve using the Square Root Property 5x^(7/2)-15=0