Question

What is the product of? (7x^2)(2x^3+5)(x^2-4x-9)

Answer 1

`(7x^(2))(2x^(3) +5)( x^(2) -4x-9)`

`(14 x^(5) +35 x^(2))( x^(2) -4x-9)`
=
`<strong>14 x^(7) -56 x^(6)-126 x^(5)+35 x^(4)-140 x^(3)-315 x^(2) </strong>`

Answer 2

`14x^7 -56x^6-126x^5+35x^4-140x^3-315x^2`

Explanation:

(7x^2)(2x^3+5)(x^2-4x-9)

Find the product of
`(7x^2)(2x^3+5)(x^2-4x-9)`

Multiply the parenthesis

`(7x^2)(2x^3+5)=14x^5+35x^2`

Now we multiply 14x^5+35x^2 inside last parenthesis

`( 14x^5+35x^2)(x^2-4x-9)`

`14x^7 -56x^6-126x^5+35x^4-140x^3-315x^2`

Combine like terms if any

`14x^7 -56x^6-126x^5+35x^4-140x^3-315x^2`