Question

How do you multiply `(4x+5)(3x^2-5)`?

Answer 1

`12x^3+15x^2-20x-25`

Explanation:

Step 1
I multiplied
`(4x)3x^2=12x^3`

Step 2
I multiplied
`4x(-5)= -20x`

So far we have
`12x^3-20x`

Step 3
I multiplied
`(5)3x^2=15x^2`

Step 4
I multiplied
`5( -5 )=-25`

We have
`15x^2+25`

Step 5
In total, we have
`12x^3 - 20x + 15x^2-25`
Final step
We put everything order by powers, since there are no like terms to combine
`12x^3+15x^2-20x-25`