Question

R= (x + 3)^2 + (x - 3)^2 - 2x^2 + 8

Answer 1

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Resolver.

R = (x + 3)² + (x - 3)² - 2x² + 8

R = x² + 2(x)(3) + 3² + x² - 2(x)(3) + 3² - 2x² + 8

R = x² + 6x + 9 + x² - 6x + 9 - 2x² + 8

R = x² + x² + 6x - 6x + 9 + 9 + 8 - 2x² + x² 

R = 2x² + 26 - x²

R = 2x² - x² + 26

R = x² + 26