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Question

Tick (✓) the correct answer:
(3q + 7p2 − 2r3 + 4) − (4p2 − 2q + 7r3 − 3) = ?
(a) (p2 + 2q + 5r3 + 1)
(b) (11p2 + q + 5r3 + 1)
(c) (−3p2 − 5q + 9r3 − 7)
(d) (3p2 + 5q − 9r3 +7)

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Solution

(d) (3p2 + 5q − 9r3 +7)

7p2 +3q -2r3 +4 4p2 -2q +7r3 -3- + - + 3p2+ 5q -9r3 + 7 ¯

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