Question

x a la quinta + 4 x a la quinta - 7x a la quinta

Answer 1

x^(5) + 4x^(5) - 7x^(5) = 0
-2x^(5) = 0
x^5 = 0

x1 = x2 = x3 = x4 = x5 = 0

Answer 2

x⁵+4x⁵-7x⁵=(1+4-7)x⁵
                =-2x⁵