GRE Question of the Day (March 31st)

Math

If \({x + y = 6t}\) and \({xy = -7t^2}\),what is the value of \({\frac{{(x^2 + y^2)}}{{t^2}}}\)?

A. 20
B. 30
C. 50
D. 60
E. 90

Correct Answer - C  - (click and drag your mouse to see the answer)

Question Discussion & Explanation