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1. The difference between tow no is 9 and the product of the two is 14. What is the square of their sum? a) 120 b) 130 c) 137 d) 145

Read Solution (Total 2)

x-y = 9
xy=14
(x+y)^2 = (x-y)^2 +4xy = 81 +56 = 137 .. option C
12 years agoHelpfull: Yes(12) No(1)

ANS C

x - y = 9
(x - y)2 = 81
x2 + y2 = 81 + 2xy = 109
(x+y)2 = x2 + y2 + 2xy = 109 + 28 = 137
So answer is 137
12 years agoHelpfull: Yes(1) No(2)

TCS Other Question

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