If x-y =13 and xy = 30, find x+y
options : a) 18
b) 19
c) 17
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Answers
Answered by
1
Answer: c)17
Step-by-step explanation:
Answered by
0
x-y=13 xy=30
(x-y)^2=x^2+y^2-2xy
169=x^2+y^2-60
x^2+y^2=229
(x+y)^2=289
x+y=17
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