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(x-3)(x+3)(x la a doua+9)-(xla a doua+2)la a doua+2(x+2)la a doua =
va rog urgent


Răspuns :

(x² - 9)(x² + 9) - (x² + 2)² + 2(x+2)² = x^4 - 81 - x^4 - 4x² - 4 + 2x² +8x +8 =
= -2x² - 77