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RailwaysSSCMathAlgebraMedium

Algebra practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.

Question language / प्रश्न भाषा

Question

प्रश्न: If x + y = 15 and xy = 44, find (x − y)^2. यदि x + y = 15 तथा xy = 44 है, तो (x − y)^2 का मान ज्ञात कीजिए।

Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।

A

41 / 41

B

45 / 45

C

49 / 49

✓

D

51 / 51

Correct Answerसही उत्तर

C. 49 / 49

Explanationव्याख्या

(x − y)^2 = (x + y)^2 − 4xy = 15^2 − 4 × 44 = 225 − 176 = 49. (x − y)^2 = (x + y)^2 − 4xy = 15^2 − 4 × 44 = 225 − 176 = 49.

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