Odpowiedź :
a) (x-5)(x+5) + (3x-1)² = x² - 25 + 9x² - 6x + 1 = 10² - 6x - 24
b) 2(x-2)(x+2) - (2+2x) = 2(x² - 4) - (4 + 8x + 4x²) = 2x² - 8 - 4 - 8x - 4x² = -2x²- 8x - 12
a) (x-5)(x+5) + (3x-1)² = x² - 25 + 9x² - 6x + 1 = 10² - 6x - 24
b) 2(x-2)(x+2) - (2+2x) = 2(x² - 4) - (4 + 8x + 4x²) = 2x² - 8 - 4 - 8x - 4x² = -2x²- 8x - 12