Oblicz wykorzystując wzory skróconego mnożenia (x+5)²-(x-3)²=x+1 (x-2)²-(x-5)(x+5)>-4(x+5)

(x+5)²-(x-3)²=x+1 x² + 10x + 25 - (x² - 6x + 9) = x + 1 x² + 10x + 25 - x² + 6x - 9 - x = 1 15x = 1 + 9 - 25 15x = - 15 x = - 15/15 = - 1 x = - 1 (x-2)²-(x-5)(x+5)>-4(x+5) x² - 4x + 4 - (x² - 25) > -4x - 20 x² - 4x + 4 - x² + 25 > -4x - 20 - 4x + 4x > - 20 - 25 - 4 0 > - 49

(x+5)do kwadr - (x-3) do kwadr = x+1 x kwadr +10x + 25 -(x kwadr - 6x +9) = x+1 x kwadr +10x + 25 -x kwadr +6x -9=x+1 16x+16=x+1 15x=-15 x=-1 (x-2) do kwadr - (x-5)(x+5) ` -4(x+5) x kwadr -4x -(x kwadr -25)` -4x-20 x kwadr -4x - x kwadr +25` -4x-20