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mrkill2196
@mrkill2196
August 2021
1
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Помогите пж!! Срочно надо!!
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Малыш024
№1
а)y^2-8y+16
b)49^x+14ax+a^2
c)25^2-1
d)9a^2-4b^2
№3
1)(x-7)(x+7)
2)(5x-y)^2
№2
a^2-18a+81-81+2a=a^2-16a=a(a-16)
№4
(2-x)^2-x(x+1.5)=4
4-2x+x^2-x^2-1.5x=4
-3.5x=0
x=0
№5
(y^2-2a)(2a+y^2)=2ay^2-4a^2+y^4-2ay^2=-4a^2+y^4
№6
1)4x^2y^2-9a^4=(2xy-3a^2)(2xy+3^2)
2)25a^2-(a+3)^2=(5a-a-3)(5a+a+3)=(4a-3)(6a+3)
3)27m^3+n^3=(3m+n)(9m^2-3mn+n^2)
0 votes
Thanks 2
mrkill2196
Спасибо большое!!
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Answers & Comments
а)y^2-8y+16
b)49^x+14ax+a^2
c)25^2-1
d)9a^2-4b^2
№3
1)(x-7)(x+7)
2)(5x-y)^2
№2
a^2-18a+81-81+2a=a^2-16a=a(a-16)
№4
(2-x)^2-x(x+1.5)=4
4-2x+x^2-x^2-1.5x=4
-3.5x=0
x=0
№5
(y^2-2a)(2a+y^2)=2ay^2-4a^2+y^4-2ay^2=-4a^2+y^4
№6
1)4x^2y^2-9a^4=(2xy-3a^2)(2xy+3^2)
2)25a^2-(a+3)^2=(5a-a-3)(5a+a+3)=(4a-3)(6a+3)
3)27m^3+n^3=(3m+n)(9m^2-3mn+n^2)