Find a³+b³ when,
a+b = 10 and a²+b² = 58
Answers
Answered by
2
Answer:
a = 3 and b = 7
then,
3^3 = 27
7^3 = 343
so,
343 + 27 = 370
Step-by-step explanation:
Answered by
1
Step-by-step explanation:
a+b=10 & a²+b²=58
(a+b)² = a²+b²+2ab
>> 10² = 58+2ab
>>2ab=100–58
= 42
>>ab=42/2
=21
(a³+b³)=a³+b³+3ab(a+b)
:. (10)³= a³+b³+3×21(10)
:. 1000=a³+b³+630
:. 1000–630=a³+b³
:. 370=a³+b³
:.a³+b³=370
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