SOLUTION: (3y^2 + 1) (3y^2 – 1)

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Question 217508: (3y^2 + 1) (3y^2 – 1)
Answer by drj(1380) About Me  (Show Source):
You can put this solution on YOUR website!
+%283y%5E2%2B1%29%283y%5E2-1%29++

Step 1. Use the FOIL (multiply First, Outer, Inner, and Last terms) method



Step 2. Simplify by combining like terms and in this case -%283y%5E2%29%2A1%2B%283y%5E2%29%2A1=0

%283y%5E2%2B1%29%283y%5E2-1%29=9y%5E4-1

Step 3. ANSWER: %283y%5E2%2B1%29%283y%5E2-1%29=9y%5E4-1%5E2=9y%5E4-1

where this formula is the difference of squares

I hope the above steps and explanation were helpful.

For free Step-By-Step Videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra and for Trigonometry, please visit http://www.FreedomUniversity.TV/courses/Trigonometry.

Also, good luck in your future studies.

Respectfully,
Dr J