RRB Junior Engineer Stage 1 Model Papers 9

Question : 18 of 100

Marks: +1, -0

The sum of two numbers is 24 and their product is 143. The sum of their squares is

Solution:

Let the two numbers be x and y.

∴ x + y = 24

and,

xy = 143

∴ x^2+y^2=(x+y)^2-2xy

=(24)^2-2×143=576-286=290

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