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irina162002
@irina162002
August 2022
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x^2+x+6xy+3y+9y^2 если x+3y=-7
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ПрофиЗнания
Х²+х+6ху+3у+9у² = (х²+6ху+9у²)+(х+3у) = (х+3у)²+(х+3у) = (-7)²+(-7) = 49-7 = 42
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ВикаВикторовна
а просто х? потерялси?(
ВикаВикторовна
Verified answer
(x²+2*3y*x +(3y)² )+x+3y = (x+3y)²+x+3y = (-7)²+3y= 49+3y+x=49-7=42
4 votes
Thanks 6
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Verified answer
(x²+2*3y*x +(3y)² )+x+3y = (x+3y)²+x+3y = (-7)²+3y= 49+3y+x=49-7=42