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

1 Answer
Jul 27, 2016

Answer:

#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#