Subject
Bank Exam
Topic
Southeast Bank Ltd. 2011 (PO)
If x = y + 4 and x = 20-y, then x2-y2=
If x = y + 4 and x = 20-y, then x2-y2=
ক)
16খ)
80গ)
144ঘ)
256Explanation
x = y + 4 or, x - y = 4 And, x = 20 - y or, x + y = 20 Thus, x2-y2= (x + y) * (x - y) = 20 * 4 = 80Related questions
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