а) (5x - Зу)^2+ 30xy = 25x^2 - 30xy + 9y^2 + 30xy = 25x^2 + 9y^2
б) 4x^4-2(x^4+ 1)^2 = 4x^4 -2x^8 - 4x^4 - 2 = -2x^8 - 2
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а) (5x - Зу)^2+ 30xy = 25x^2 - 30xy + 9y^2 + 30xy = 25x^2 + 9y^2
б) 4x^4-2(x^4+ 1)^2 = 4x^4 -2x^8 - 4x^4 - 2 = -2x^8 - 2