The answer is 2x^2-3x-2.
To solve this, you take f(x)-g(x) which is 2x^2-5-3x+3. This simplifies to 2x^2-3x-2.
< ABC is a straight angle
no right angles
no complimentary angles
< ABD and < DBC are supplementary angles
You're welcome you didn't take the full question
