Question 1038004
{{{x^2 + 6x + 9 )}}}
Look at the 3rd term (9). What are the factors of 9, than when added together, give the result of the coefficient of x in the second term(6)?
Factors of 9:
1x9 (sum = 10, not 6)
3x3 (sum = 6) - this is the one you want.
{{{highlight((x+3)(x+3))}}}
Multiply it out and see that you get the original.

I will leave the 2nd part of the problem to you.
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Good Luck,
tutor_paul@yahoo.com