Question

In the following exercises, add or subtract the polynomials. $\left(a^2-b^2\right)-\left(a^2+3 a b-4 b^2\right)$

   In the following exercises, add or subtract the polynomials. $\left(a^2-b^2\right)-\left(a^2+3 a b-4 b^2\right)$
Intermediate Algebra
Intermediate Algebra
Lynn Marecek 1st Edition
Chapter 5, Problem 57 ↓
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In the following exercises, add or subtract the polynomials. $\left(a^2-b^2\right)-\left(a^2+3 a b-4 b^2\right)$
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Transcript

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00:01 Today we're going to learn how to subtract polynomials.
00:05 Now the first time we're going to do is to get each term out of the brackets.
00:10 So therefore we're going to have a squared minus b squared, right? now remember that any time you have a subtraction sign outside a bracket, all signs in that bracket turns to its opposite sign.
00:29 So here we're going to have minus a squared minus 3...
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