ОЧЕНЬ СРОЧНО!!!! номер 1171(1,3)

Question

ОЧЕНЬ СРОЧНО!!!! номер 1171(1,3)

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Comments

3)13+8x^+14x

Answer 1

1) = 6x^2 + 4y^2 -9x^2 = 4y^2 -3x^2

3) = 25 -4x^2 - (12-8x - 6x +4x^2) = 25 - 4x^2 -12 +8x + 6x -4x^2 = 13 -8x^2 + 14x