exam Maths Puzzle Numerical Ability

how would i do this?
Factor the following polynomial completely.

y2 + 12y + 36=

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exam Other Question

Q. Rahul started buiseness with capital of rs 8600. After six month sanjay joined firm with the investment of some capital. If at the end of the year each of them gets equal amount of profit. How much did sanjay invest in the buiseness?

1. Rs 18000
2. Rs 17500
3. Rs 16000
4. Rs 16500 how do you find the correlation coefficient