Wykonaj działania : a) -(2+x)do kwadratu -5(2x+3)do kwadratu-3(4-x)*(4+x)=
b) 4 ( m+2n) do kwadratu + 3 (4m-n) do kwadratu-2(m+n)(m-n)=
c) [(x-2y)do kwadratu -(x+2y)do kwadratu]*3=
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-2 - x kwadrat - 10x - 15 = x kwadrat - 10x-17
4m kwadrat + 8 n kwadrat + 12 m kwadrat - 3n kwadrat - 2 m kwadrat + 2 n kwadrat= 18 m kwadrat + 7 n kwadrat
Trzeciego nie wiem ; /