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Alicefox321
@Alicefox321
July 2022
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помогите! (х+у-7)²+(х-2у- 2)² = 0
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(х+у-7)^2+(х-2у- 2)^2= 0
(x+y)^2-2 (x+y)•7+49+(x-2y)^2-2 (x-2y)•2+4
x^2+2xy+y^2-14 (x+y)+49+x^2-4xy+4y^2-4 (x-2y)+4
x^2+2xy+y^2-14x-14y+49+x^2-4xy+4y^2-4x+8y+4
2x^2-2xy+5y^2-18-6y+53
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Answers & Comments
(x+y)^2-2 (x+y)•7+49+(x-2y)^2-2 (x-2y)•2+4
x^2+2xy+y^2-14 (x+y)+49+x^2-4xy+4y^2-4 (x-2y)+4
x^2+2xy+y^2-14x-14y+49+x^2-4xy+4y^2-4x+8y+4
2x^2-2xy+5y^2-18-6y+53