From the sum of polynomials 3a2−ab−2b2 and 2a2+5ab−3b2 subtract polynomial a2−3ab−4b2.

Step-by-step explanation:

First, we will sum

and

Then, from that sum, we will SUBTRACT  

First, lets take the sum by combining like terms:

Now, lets do the subtraction:

This is the answer.

900 degrees

step-by-step explanation: