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dima678435
@dima678435
June 2022
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Сумма двух чисел равна √15, а их разность √7. Найдите произведение этих чисел.
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Evgenia4836
Verified answer
A+b=√15
a-b=√7
a+b+a-b=√15+√7
2a=√15+√7
a=(√15+√7)/2
b=(√15+√7)/2 - √7
(√15+√7)/2 *(√15+√7-2√7)/2=(√15+√7)*(√15-√7)/4= (15-7)/4= 2
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Verified answer
A+b=√15a-b=√7
a+b+a-b=√15+√7
2a=√15+√7
a=(√15+√7)/2
b=(√15+√7)/2 - √7
(√15+√7)/2 *(√15+√7-2√7)/2=(√15+√7)*(√15-√7)/4= (15-7)/4= 2