Zapisz w najprostrzej postaci
a) (2x-5)(3x+1)-(2x-3)^2
b) (x+2)^3 +2x(x+2 pier.5)(x-2 pier.5)
a) (2x-5)(3x+1)-(2x-3)^2 = 6x² + 2x - 5x - 5 - 4x² + 12x - 9 = 2x² + 9x - 14
b) (x+2)^3 +2x(x+2 pier.5)(x-2 pier.5) = x³ + 6x² + 12x + 8 + 2x(x² - 20) =
x³ + 6x² + 12x + 8 + 2x³ - 40x =3x³ + 6x² - 28x + 8
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a) (2x-5)(3x+1)-(2x-3)^2 = 6x² + 2x - 5x - 5 - 4x² + 12x - 9 = 2x² + 9x - 14
b) (x+2)^3 +2x(x+2 pier.5)(x-2 pier.5) = x³ + 6x² + 12x + 8 + 2x(x² - 20) =
x³ + 6x² + 12x + 8 + 2x³ - 40x =3x³ + 6x² - 28x + 8