SOLUTION: If a and b are negative and c is positive, determine whether the following are positive or negative. (a) (-a)(-c) (b) (-a)(b) (c) (c-b)(c-a) (d) a(b - c)

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Question 4596: If a and b are negative and c is positive, determine whether the following are positive or negative.
(a) (-a)(-c)
(b) (-a)(b)
(c) (c-b)(c-a)
(d) a(b - c)
Answer by xcentaur(357)   (Show Source): You can put this solution on YOUR website!
{a-,b-,c+}
[a]
(-a)(-c)
(--)(-+)
(+)(-)
-
[a] -


[b]
(b)
(-a)(b)
(-a)(b)
(--)(-)
(+)(-)
-
[b] -


[c]
(c-b)(c-a)
({+}-{-})({+}-{-})
(++)(++)
+
[c] +


[d]
a(b - c)
(-)[(-)-(+)]
-[(-)-]
-[-]
+
[d] +


Hope you followed all this,best of luck

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