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Данил1224
@Данил1224
July 2022
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Помогите не пойму как решать ! (4а^2+9а)-(а^2 -1+9а)
6а^4-2а^2(3а^2+а)
ху(х-у)-2ху(х+у)
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wejde
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(4а^2+9а)-(а^2 -1+9а)=4a^2+9a-a^2+1-9a=3a^2+1
6а^4-2а^2(3а^2+а)=6a^4-6a^4-2a^3=-2a^3
ху(х-у)-2ху(х+у)=x^2y-xy^2-2x^2y-2xy^2=-x^2y-3xy^2
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(4а^2+9а)-(а^2 -1+9а)=4a^2+9a-a^2+1-9a=3a^2+16а^4-2а^2(3а^2+а)=6a^4-6a^4-2a^3=-2a^3
ху(х-у)-2ху(х+у)=x^2y-xy^2-2x^2y-2xy^2=-x^2y-3xy^2