dla a=1
a(2a+1) = 2a² + a = 2 + 1 =3
dla s= -3
s²- 1 = (-3)² - 1 = 9 -1 = 8
dla x= -3, y=4
2(x-y) = 2x – 2y = 2 *(-3) – 2 * 4 = -6 – 8 = -14
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dla a=1
a(2a+1) = 2a² + a = 2 + 1 =3
dla s= -3
s²- 1 = (-3)² - 1 = 9 -1 = 8
dla x= -3, y=4
2(x-y) = 2x – 2y = 2 *(-3) – 2 * 4 = -6 – 8 = -14