Answer:
There are no like terms.
so its -7a+2b
Step-by-step explanation:
(-45,45,14)
(r+v)*w=((9,8,3)+(6,7,-1))*(-3,3,7)=(15,15,2)*(-3,3,7)=(-45,45,14)
Does this help (I'm not sure of the rightness of this answer), if it did, please mark brainliest
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