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Question

5xy+25y+3x+15 is factorised as

A
(5y+3)(x+5)
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B
(y+3)(5x+25)
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C
(y3)(x5)
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Solution

The correct option is A (5y+3)(x+5)
Take the first two and last two terms:
(5xy+25y)+(3x+15)
=5y(x+5)+3(x+5)
=(5y+3)(x+5)

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