In this video, learn how to add & subtract polynomials by combining like terms.

In this video, we are going to look at adding and subtracting polynomials.
For example:
To simplify the expression:
$(3x^2+5x+3xy)+(4x^2-3x+7xy)$
combine the like terms to get the final answer of
$7x^2+2x+10xy$
To simplify the expression:
$(3x^2+5x+3xy)-(4x^2-3x+7xy)$
we can either keep-change-change, or distribute the negative to get
$(3x^2+5x+3xy)+(-4x^2+3x-7xy)$
Then, combine like terms to get the final answer of
$-x^2+8x-4xy$
Sometimes, every term may not line up, such as in the expression
$(4x^2+5x)-(3x^2+2x-4y)$
Solve as you would normally by either keep-change-change or distributing the negative, and then combining like terms to get a final answer of
$x^2+3x+4y$

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Used by students across the country. Pre-Algebra, Algebra I, Geometry, & Algebra II