SOLUTION: Can someone please show me step by step to solve y^2+72 when factoring to find the sum and difference?

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Question 729389: Can someone please show me step by step to solve y^2+72 when factoring to find the sum and difference?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
y^2+72
y+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
y=(-0+-sqrt(0^2-4*1*72))/2*1
y=(0+-sqrt(0-288)/2
y=(0+-sqrt-288)/2
y=(0+-16.87i)/2
y=0+-8.485i ans.