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A ) (b+3)2 -(b-3)2

b)(5m+4n)2 – (4m-5n)2

c)(3x-2)2 +2(x+3)2

e)(5-0,2k3)2 + 5(k3-5)2

f)(a+2)2 +(a-2)2

g)(x-2)2 -(x+1)2

h)2(3+b)2 -12b

i)4x2 +1 – (2x+1)2

j)(x+3y)2 -9y2



błagam o bardzo szybkie odp.. na jutroo !!! ; )

bd nja ***


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