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Subtract the following expressions: ab – bc – ca from –ab + bc + ca - Mathematics

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Question

Subtract the following expressions:

ab – bc – ca from –ab + bc + ca

Sum
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Solution

We have, –ab + bc + ca – (ab – bc – ca)

= –ab + bc + ca – ab + bc + ca

On combining the like terms,

= –ab – ab + bc + bc + ca + ca

= –2ab + 2bc + 2ca

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Chapter 10: Algebraic Expressions - Exercise [Page 321]

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NCERT Exemplar Mathematics [English] Class 7
Chapter 10 Algebraic Expressions
Exercise | Q 58. (e) | Page 321
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