Register
(x + y)2 = 64 et x y = 15, alors x2 + y2​
189k views
7 votes
(x + y)2 = 64 et x y = 15, alors x2 + y2​

User Guckmalmensch
by
8.3k points

1 Answer

12 votes

Answer:


x^2+y^2=34

Explanation:

Expand
(x+y)^2.


(x+y)^2=x^2+2xy+y^2


x^2+2xy+y^2=64

Substitute 15 for xy.


x^2+2(15)+y^2=64\\\\x^2+30+y^2=64\\\\x^2+y^2=34

User Gazmend
by
8.2k points
← Prev Question Next Question →

Related questions

Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

What is .725 as a fraction
How do you estimate of 4 5/8 X 1/3
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
Write words to match the expression. 24- ( 6+3)
A dealer sells a certain type of chair and a table for $40. He also sells the same sort of table and a desk for $83 or a chair and a desk for $77. Find the price of a chair, table, and of a desk.
Link Copied!