(а* b)*2=28
a+b=28×2=14
x=14-y
(14 – у) * у = 40;
14у – у2 - 40 = 0;
– у2 + 14у - 40 = 0;
D = 142 – 4 * (-1) * (-40) = 196 – 160 = 36;
х1= (-14 + √36)/(2 * (-1)) = (-14 + 6)/(-2) = -8/(-2) = 4;
х2= (-14 - √36)/(2 * (-1)) = (-14 - 6)/(-2) = -20/(-2) = 10.
у1 = 14 – 4 = 10;
у2 = 14 – 10 = 4.
Ответ;4м,10м,4м,10
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(а* b)*2=28
a+b=28×2=14
x=14-y
(14 – у) * у = 40;
14у – у2 - 40 = 0;
– у2 + 14у - 40 = 0;
D = 142 – 4 * (-1) * (-40) = 196 – 160 = 36;
х1= (-14 + √36)/(2 * (-1)) = (-14 + 6)/(-2) = -8/(-2) = 4;
х2= (-14 - √36)/(2 * (-1)) = (-14 - 6)/(-2) = -20/(-2) = 10.
у1 = 14 – 4 = 10;
у2 = 14 – 10 = 4.
Ответ;4м,10м,4м,10