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mariagrigoryan3
@mariagrigoryan3
August 2022
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помогите пожалуйста. буду благодарна. спасибо заранее
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boss9800
Verified answer
4) x+y=9 => x=9-y => x=9-y => x=6
x-y=3 x-y=3 9-y-y=3 -2y=-6 => y=3
5) (a^2-4)=(a^2-2^2)=(a-2)(a+2)
(a^2-4)/(a+2)=((a-2)(a+2))/(a+2)=a-2
6) S=a^2 => a=√S => a=√20=2√5
7) P=2(a+b)
P=2(5+7)=24
1 votes
Thanks 1
katyaba28
4)2х=12
х=6
5)(а-2)(а+2)/(а+2)=а-2
6)2√5
7)Р=5*2+7*2=24
0 votes
Thanks 0
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Answers & Comments
Verified answer
4) x+y=9 => x=9-y => x=9-y => x=6x-y=3 x-y=3 9-y-y=3 -2y=-6 => y=3
5) (a^2-4)=(a^2-2^2)=(a-2)(a+2)
(a^2-4)/(a+2)=((a-2)(a+2))/(a+2)=a-2
6) S=a^2 => a=√S => a=√20=2√5
7) P=2(a+b)
P=2(5+7)=24
х=6
5)(а-2)(а+2)/(а+2)=а-2
6)2√5
7)Р=5*2+7*2=24