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Question

Subtract the second expression from the first:
5x2+4y2−6y+8 and x2−5y2+2xy+3y−10

A
4xy2+9xy2+9y2y+12
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B
4xy+9y3+9y+2xy+18
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C
4x2+9y29y2xy+18
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D
x2+9y29y2xy+12
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Solution

The correct option is B 4x2+9y29y2xy+18
5x2+4y26y+8; x25y2+2xy+3y10
=5x2+4y26y+8(x25y2+2xy+3y10)
=5x2+4y26y+8x2+5y22xy3y+10
=4x2+9y29y2xy+18

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