combining like terms
Combine the A's and the B's using their signs as well. so -21a + 14a = -7a just add the -21 and +14
do the same for the B's -42b - 9b = -51b therefore your answer is -7a -51b
combining like terms
Combine the A's and the B's using their signs as well. so -21a + 14a = -7a just add the -21 and +14
do the same for the B's -42b - 9b = -51b therefore your answer is -7a -51b
Approach these problems the same way you would if you were adding apples and bananas.
If you had:
-21 apples -42 bananas +14 apples -9 bananas
how would you do it? You'd separate the apples and bananas, of course. -21a +14a = -7a; -42b -9b = -51b.
Look for common terms and combine as appropriate.
thank you very much! very helpful website
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thank you very much! very helpful website