SOLUTION: Please help me factor out 81y^4 + 64z^4!!

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Question 889302: Please help me factor out 81y^4 + 64z^4!!
Answer by Nigelyul(18)   (Show Source): You can put this solution on YOUR website!
To complete the square add and also subtract it to compensate of the addition.



Now it's a difference of two squares


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