Math, asked by sakib2324, 1 year ago

x³+y³=8 and x²+y²=4 then x+y=?

Answers

Answered by UnknownUsername
0
x³+y³=8
=>(x+y)³=8+3
=>x+y=cube root of 11

UnknownUsername: i've done a mistake. it's on another comment
Answered by rikd283gmailcom
2
This answer will be



X + Y = 2

sakib2324: how??
UnknownUsername: sorry mistake. I added 3 instead of subtracting it, then the result will come cube root 5, but bt the second equation, we have x+y=2. this is done by using the formula (a+b)to the power x = a to the power x + b to the power x + xab. sorry for the minor mistake of transposition. this question had different answers, because a²+b² is not equal to a+b whole square
sakib2324: sorry but couldn't understand
sakib2324: I couldn't understand
sakib2324: please give me picture of the solution
UnknownUsername: soory. i have done many mistakes. use the formula a²+b²+2ab=a+b whole square along with some transposition. i don't know how to put pictures in the comments. just tell me how and i will do it, but i don't get all time to do this app
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