SSC CHSL 8 Jan 2017 Evening Shift

Question 53

If x + y = 12 and xy = 32, then what is the value of $$x^{2} + y^{2}$$

Solution

Given : $$(x + y) = 12$$ and $$xy = 32$$

Using $$(x + y)^2 = x^2 + y^2 + 2xy$$

=> $$(12)^2 = (x^2 + y^2) + (2 \times 32)$$

=> $$(x^2 + y^2) = 144 - 64 = 80$$

=> Ans - (D)

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