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Question

Subtract:
4p2 + 5q2 − 6r2 + 7 from 3p2 − 4q2 − 5r2 − 6

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Solution

Writing the terms of the given expressions (in the same order) in the form of rows with like terms below each other and subtracting column-wise:

3p2-4q2-5r2-6 4p2+5q2-6r2+7- - + - -p2-9q2+r2-13

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