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Арина9087
@Арина9087
March 2022
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Нужно решить что на фотке. Именно решить, а не выбрать что на фото
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sangers1959
Verified answer
A²/(3a-18)+3b/(18-3a)=-a²/(18-3a)+3b/(18-3a)=(3b-a²)/(18-3a). (3)
(x²+y²)/(x²-y²)-y/(x-y)-y/(x+y)=(x²+y²-y(x+y)-y(x-y))/(x²-y²)=
=(x²+y²-xy-y²-xy+y²)/(x²-y²)=(x²-2xy+y²)/((x-y)(x+y))=(x-y)²/((x-y)(x+y))=(x-y)/(x+y). (2)
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Verified answer
A²/(3a-18)+3b/(18-3a)=-a²/(18-3a)+3b/(18-3a)=(3b-a²)/(18-3a). (3)(x²+y²)/(x²-y²)-y/(x-y)-y/(x+y)=(x²+y²-y(x+y)-y(x-y))/(x²-y²)=
=(x²+y²-xy-y²-xy+y²)/(x²-y²)=(x²-2xy+y²)/((x-y)(x+y))=(x-y)²/((x-y)(x+y))=(x-y)/(x+y). (2)