The product of two numbers is 120 and the sum of their squares is 289. the sum of the number is:
a. 20
b. 23
c. 169
d. none of these
Answers
Answered by
7
ab=120 a square + b square =289
use (a+b)*2 formula u'll get a+b=23
a=15 and b= 8
Answered by
16
aXb=120
a^2+b^2=289
a+b=?
a^2+2ab+b^2=(a+b)^2
289+2X120=(a+b)^2
289+240=(a+b)^2
529=(a+b)^2
(a+b)=√529
a+b=23
So it is (b)23
Hope you found it helpful :D
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