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Question

The value of -10a2 + 15b2 + 20c2 is equal to

A
5(2a2 + 3b2 + 4c2)
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B
5(2a2 + 3b2 - 4c2)
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C
5(2a2 - 3b2 + 4c2)
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D
5(-2a2 + 3b2 + 4c2)
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Solution

The correct option is D 5(-2a2 + 3b2 + 4c2)
Exp. = -10a2 + 15b2 + 20c2
= 5(-2a2 + 3b2 + 4c2)

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