1) (x + 2)(x² - 2x + 4 ) - x(x + 2)(x - 2) = x³ + 2³ - x(x² - 4) = x³ + 8 - x³ + 4x =
= 4x + 8
2) (x + 2)(x² - 2x + 4) - x(x + 2)(x - 2) = x³ + 2³ - x(x² - 4) = x³ + 8 - x³ + 4x =
x = 1 ⇒ 4x + 8 = 4 * 1 + 8 =4 + 8 = 12
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1) (x + 2)(x² - 2x + 4 ) - x(x + 2)(x - 2) = x³ + 2³ - x(x² - 4) = x³ + 8 - x³ + 4x =
= 4x + 8
2) (x + 2)(x² - 2x + 4) - x(x + 2)(x - 2) = x³ + 2³ - x(x² - 4) = x³ + 8 - x³ + 4x =
= 4x + 8
x = 1 ⇒ 4x + 8 = 4 * 1 + 8 =4 + 8 = 12