Question

Please answer this question​

Answer 1

I have attached above the solution

hope it helps

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Answer 2

Answer:

2x²-5y²-7z²-(-3x²+7y²-z²)

(2x-5y-7z)²-(-3x+7y-z)²

(2x)²+(-5y)²+(-7z)²-(-3x)²+(7y)²+(-z)²

4x²+25y²+49z²-9x²+49y²+z²