the sum of ages boy his 12 years and the sum of square is 74 years . find their ages
Answers
Answered by
1
Answer:
(5,7) or (7,5)
Step-by-step explanation:
x+y=12. x=12-y
x2+y2=74
PUTTING ON EQUATION
on solving we gat answwr
Answered by
1
Step-by-step explanation:
given ,x+y=12
x^2+y^2=74
x=12-y
(12-y)^2+y^2=74
144+y^2-24y+y^2=74
2y^2-24y+70=0
y^2-12y+35=0
y^2-7y-5y+35=0
y(y-7)-5(y-7)=0
y=5 and y= 7
their ages are 5 and 7 . if you take 5 you will get 7. if you take 7 you will get 5 . both are correct.
5+7=12
5^2+7^2=25+49=74
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