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Algebraic Expressions — Maths STD 7 — Question

Maharashtra BoardEnglish MediumSTD 7MathsAlgebraic Expressions2 Marks
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

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