Mathematics
Grade10
Easy
Question
Factor 7x3y – 63xy3
- 7xy (x + 3y)2
- 7xy (x – 3y)2
- 7xy (x – 3y) (x – 3y)
- 7xy (x – 3y) (x + 3y)
The correct answer is: 7xy (x – 3y) (x + 3y)
Take out 7xy,
7xy (x2 – 9y2) = 7xy (x2 – (3y)2) = 7xy (x – 3y) (x + 3y)
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