Question

If the sum and difference of two numbers are 57 and 26 respectively, then the difference Of their squares is:
A) 1420
B) 1440
C) 1450
D) 1482
E) None of these

Answer 1

e, none of the above

give that x+y =57......(1)

(+) x-y=26

_________________

2x=83

x=41.5; x^2=1722.25

substituting x value in 1

y =5.5; y^2= 30.25

x^2+y^2= 1722.25+30.25=1752.5