Question

(-3x-5)4 expand the expression.

Answer 1

The new expression would be -12x-20, this can be done using distributive property.

Answer 2

The first term is : [4!/(4-0)!0!]*(-3x)^4(-5)^0=81x^4
the second term is [4!(4-1)!1!]*(-3x)^3(-5)^1=540x^3
the third term is [4!/(4-2)!2!]*(-3x)^2(-5)^2=1350x^2
the fourth term is [4!/(4-3)!3!](-3x)^1(-5)^3=1500x
the fifth term is: [4!/(4-4)!4!](-3x)^0(-5)^4=625
so the result is: 81x^5+540x^3+1350x^2+1500x+625