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gun6
@gun6
August 2022
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Найдите значение выражения при a=0,8;b=0,6
а) (2a-5b)2-(2а+5b)2
б)(3а-b)2+(a+3b)2
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maxleshok
Просто подставляем значения в уравнение выходит :
а.)
(2*0.8-5*0.6)2-(2*0.8+5*0.6)2=-2.8-8.8= -11.6
б.)
(2.4-0.6)2+(0.8+1.8)2=3.6+5.2=8.8
5 votes
Thanks 4
Laplen
А) (2*0.8-5*0.6)*2-2*(2*0.8+5*0.6)=2*(1.6-3)-2*(1.6+3)=2*(-1.4)-2*4.6=-3.7-9.8=-13.5
б) 2*(3*0.8-0.6)+2*(0.8+3*0.6)=2*(2.4-0.6)+2*(0.8+1.8)=2*1.8+2*2.6=3.6+5.2= 8.8.
2 votes
Thanks 1
maxleshok
Не правильное решение примера а
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Answers & Comments
а.)
(2*0.8-5*0.6)2-(2*0.8+5*0.6)2=-2.8-8.8= -11.6
б.)
(2.4-0.6)2+(0.8+1.8)2=3.6+5.2=8.8
б) 2*(3*0.8-0.6)+2*(0.8+3*0.6)=2*(2.4-0.6)+2*(0.8+1.8)=2*1.8+2*2.6=3.6+5.2= 8.8.