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Subtract the following expressions: –7p2qr from –3p2qr

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Question

Subtract the following expressions:

–7p2qr from –3p2qr

Sum
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Solution

We have, –3p2qr – (–7p2qr)

= –3p2qr + 7p2qr

= p2qr(–3 + 7)  ...[∵ With –ve sign, +ve sign will be change]

= 4p2qr

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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. (a) | Page 321
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