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प्रश्न
If x2 – y2 = 16 and (x + y) = 8 then (x – y) is ___________
पर्याय
8
3
2
1
MCQ
रिकाम्या जागा भरा
उत्तर
2
Explanation;
Hint:
x2 – y2 = 16
(x + y)(x – y) = 16
8(x – y) = 16
(x – y) = `16/8`
= 2
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Expansion of (x + a)(x + b)(x + c)
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