CPM Homework Help : AC Problem 3-15

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Home > AC > Chapter 3 > Lesson 3.1.2 > Problem 3-15

3-15.

Copy and simplify the following expressions by combining like terms. Homework Help ✎

$x+3x−3+2x^2+8−5x$
Hint (a):
Flip subtraction to addition.
$x+3x+(−3)+2x^2+8+(−5x)$
More Help (a):
Combine like terms.
Remember that you cannot combine $x$ and $x^2$ .
Answer (a):
$−x+2x^2+5$

$2x+4y^2−6y^2−9+1−x+3x$
Hint (b):
See the hint in part (a).

$2x^2+30y−3y^2+4xy−14−x$
Hint (c):
Remember that $xy$ cannot be combined with $x$ or $y$ .
See the hints in part (a).
Answer (c):
$2x^2+(−3y^2)+4xy+30y+(−x)+(−14)$

$20+3xy−3xy+y^2+10−y^2$
Hint (d):
See the hints in part (a) and part (c).

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