Zapisz wyrażenie (x+10)(x-5)-(x do 2-25) w jak najprostrzej postaci i oblicz jego wartość dla x=3
(x+10)(x-5)-(x do 2-25)
x2+5x+10x-50-x2-25
15x-75
15*3-75=45=75=-30
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(x+10)(x-5)-(x do 2-25)
x2+5x+10x-50-x2-25
15x-75
15*3-75=45=75=-30