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=> 2x^2 - 8x + 5x - 20 = 0
=> 2x (x-4) + 5 (x-4) = 0
=> (2x+5) (x-4) = 0
=> x = -5/2 or x = 4
0 - 0
1 - 1
-1 - 7
1/2 - -1 1/4
2 - 10
3 - 27
b)
0 - 1 1/4
1 - 1 1/16
-1 - 1 3/4
2 - 1
-2 - 2
3 - 1 1/16
-3 - 2 1/4
Mam nadzieję że pomogłam :)