200/2*(540+460/10)= 1200-200/40*5*5= 1200-200/(40*5)*5= (1200-200/40)*5*5= - id562723420200730 от BouhjrMans228 30.07.2020 13:19

Question

Математика: 200/2*(540+460/10)= 1200-200/40*5*5= 1200-200/(40*5)*5= (1200-200/40)*5*5=

BouhjrMans228 · Accepted Answer

А) числитель = x^2 -2x - 3 = x^2 - 1 - 2x - 2 = (x^2 - 1) - 2*(x+1) = = (x-1)*(x+1) - 2*(x+1) = (x+1)*(x-1 -2) = (x+1)*(x-3). знаменатель = x^2 + 2x + 1 = (x^2 + x) + (x+1) = x*(x+1) + (x+1) = (x+1)*(x+1). дробь = (x+1)*(x-3)/( (x+1)*(x+1) ) = [сокращаем на (x+1)] = (x-3)/(x+1). б) числитель = x^2 - 4x + 4 = x^2 - 2x - 2x + 4 = x*(x-2) - 2*(x - 2) = = (x-2)*(x-2). знаменатель = x^2 + 2x - 8 = x^2 - 2x + 4x - 8 = x*(x-2) + 4*(x-2) = = (x-2)*(x+4). дробь = (x-2)*(x-2)/( (x-2)*(x+4) ) = [сокращаем...

200/2(540+460/10)= 1200-200/405*5= 1200-200/(405)5= (1200-200/40)55=

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