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SufferXarge
@SufferXarge
October 2021
2
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Помогите решить по АЛГЕБРЕ
а) (p-2 )^{2} +3 p^{2}
б) 81 x^{2} -(9x+7y )^{2}
в)c(2c-1 )^{2}
г) -4(p-2a )^{2}
д) a(a-7)+(a+3 )^{2}
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ВладимирБ
Verified answer
Решение смотри в приложении
2 votes
Thanks 1
SufferXarge
Спасибо большое!
shyngys7sk
(p-2 )^{2} +3 p^{2} =p2-4p+4 + 3p2 = 4p2-4p+4
81 x^{2} -(9x+7y )^{2} = 81x2 - 81x2 + 126xy+49y2=126xy+49y2
c(2c-1 )^{2} = c * 4c2 - 4c +1=4c2 - 3c +1
-4(p-2a )^{2} = -4 * p2 - 4ap +4a2
a(a-7)+(a+3 )^{2}=a2 - 7a + a2 + 6a + 9= 2a2 -a +9
0 votes
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Answers & Comments
Verified answer
Решение смотри в приложении81 x^{2} -(9x+7y )^{2} = 81x2 - 81x2 + 126xy+49y2=126xy+49y2
c(2c-1 )^{2} = c * 4c2 - 4c +1=4c2 - 3c +1
-4(p-2a )^{2} = -4 * p2 - 4ap +4a2
a(a-7)+(a+3 )^{2}=a2 - 7a + a2 + 6a + 9= 2a2 -a +9