christinanwilli
christinanwilli
24-02-2018
Mathematics
contestada
(7a-b+3) - (-2a-8b+8)
Respuesta :
creeds25
creeds25
24-02-2018
(7a-b+3)-(-2a-8b+8)
Apply plus/minus rule.
-(-a)= a and -(a)=-a
we get
(7a-b+3)-(-2a-8b+8)= 7a-b+3+2a+8b-8
Add like terms
=9a+7b-5
Answer: 9a + 7b - 5
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