Hi,

Multiply. (x^2+x+5)(x-5)

Take it a step at a time: for ex: b(x-5) = x*b - 5*b

first Multiplying thru with x and then multiplying thru with -5

x^3 + x^2 + 5x - 5x^2 - 5x - 25

combining like terms

x^3 - 4x^2 - 25