Question
Add the following:
$4ab - 5bc + 7ca$
$-3ab + 2bc - 3ca$
$5ab - 3bc + 4ca$
✓
Answer
Required expression: $= (4ab - 5bc + 7ca) + (-3ab + 2bc - 3ca) + (5ab - 3bc + 4ca)$
Collecting positive and negative like terms together,
we get $4ab - 3ab + 5ab - 5bc + 2bc - 3bc + 7ca - 3ca + 4ca $
$= 9ab - 3ab - 8bc + 2bc + 11ca - 3ca $
$= 6ab - 6bc + 8ca$
Collecting positive and negative like terms together,
we get $4ab - 3ab + 5ab - 5bc + 2bc - 3bc + 7ca - 3ca + 4ca $
$= 9ab - 3ab - 8bc + 2bc + 11ca - 3ca $
$= 6ab - 6bc + 8ca$
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