Math Practice Problems #1

While out roaming the Internet, I sometimes encounter people who need help with their homework, so I had the idea of collecting their questions and posting them here.


"If the polynomial 4-7x+2x²-5x³ has degree a, leading coefficient b, and constant term c, then the value of 3a-2b-c is _____."

Well, the highest exponent is 3 from -5x³,and the leading coefficient is always attacher to the highest exponent, so that's -5. The constant is the term that doesn't have an exponent, so that's 4.

So...
a=3
b=-5
c=4

And we can solve the problem.

3a-2b-c
3(3)-2(-5)-4
9-(-10)-4
9+10-4
15

And the answer is 15.

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