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Q.

Subtract 15x²y²z² − 10xy − 18x from 30x²y²z² + 12xy + 14x.

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a

15x²y²z² + 11xy + 32x

b

15x²y²z² + 22xy + 32x

c

30x²y²z² + 22xy + 32x

d

15x²y²z² + 22xy + 4x

answer is B.

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Detailed Solution

(30x²y²z² + 12xy + 14x) − (15x²y²z² − 10xy − 18x)

= 30x²y²z² + 12xy + 14x − 15x²y²z² + 10xy + 18x

Collecting the like terms together, we get

= 30x²y²z² − 15x²y²z² + 12xy + 10xy + 14x + 18x

= 15x²y²z² + 22xy + 32x

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