Doprowadz do najprostrzej postaci wyażenia a) a(a-3)-4(a do kwadratu-3a) b) -(2-y do kwadratu)-2y(3+0,5y) c a-a(b-1)-b(1-a) d 4x(2-x)-12-2(6-2x do kwadratu)
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a)
2a-3a-4a2+12a
11a-4a2
b)
-2+y2-6y-y2
-2-6y
c)
a-ab+a-b+ab
2a-b
d)
8x-4x2-12-12+4x2
8x-24