831. x² - xy + y² when x = -2, y = 2 value of expression is _____?
- A. None of these
- B. 13
- C. 12
- D. -12
Check answer and explanation
Answer: 12
Explanation x² - xy + y² = (-2)² - (-2)(2) + (2)² = 4 + 4 + 4 = 12
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Answer: 12
Explanation x² - xy + y² = (-2)² - (-2)(2) + (2)² = 4 + 4 + 4 = 12
ثقافت کا کونسا سب سے اہم حصہ ھے جو خیالات اور احساسات کے اظہار کا موثر طریقہ ہے۔
Answer: Language
Explanation Language is one of the most important parts of any culture. It is the way by which people communicate with one another, build relationships, and create a sense of community.
موافقت کی وجہ سے جانداروں کے زندہ رہنے کے امکانات کیوں بڑھ جاتے ہیں؟
Answer: It improves the ability to live and reproduce
Explanation Adaptation helps organisms survive in their environment. It improves their ability to cope with changes . Adapted organisms reproduce more successfully. This increases survival chances of the species. So, adaptation enhances both survival and reproduction . Last verified on 12-04-2026
Answer: Right
Explanation An angle inscribed in a semicircle is always 90° due to the Thales' Theorem . It is called a right angle because the angle subtended by a diameter is always right. Last verified on 06-05-2026
Answer: -5 + 1 = 4
Explanation Let's evaluate each statement: 1. -5 + 1 = -4 (not 4), so this statement is false. 2. 4 - 5 = -1 ( true ) 3. 2 + (-1) = 1 ( true ) 4. -7 + (-6) = -13 ( true )
کون سا لاجک گیٹ صرف اس وقت آؤٹ پٹ 1 دیتا ہے جب دونوں اِن پٹس 1 ہوں؟
Answer: AND gate
Explanation An AND gate gives output 1 only when both inputs are 1 . If any input is 0, output becomes 0. It follows the rule: 1 AND 1 = 1. Last verified on 12-04-2026
Answer: عدم
Explanation وجود کا مطلب ہے موجود ہونا یا کسی چیز کا ہونا ۔ اس کی ضد " عدم " ہے، جس کا مطلب ہے نہ ہونا یا غیر موجودگی ۔
اگر استاد وضاحت کرتا ہے لیکن طلبہ پھر بھی الجھن میں رہتے ہیں تو یہ کس چیز کی کمی کو ظاہر کرتا ہے؟
Answer: Clarity
Explanation Clarity means clear and understandable explanation of the lesson. If students are confused , it shows the teacher failed to provide clear instruction. Good teaching always ensures simple, structured, and understandable delivery. Lack of clarity reduces student learning effectiveness. Last verified on 11-04-2026
کلاں کوٹ قلعہ ۔۔۔۔۔ کے قریب واقع ہے؟
Answer: Thatta
Explanation Kalan Kot Fort was built probably in 14th century along with Thatta . It is located 5km south of Makli. ********** VU CBT FIA PAPER 25-12-2021
Answer: Below
Explanation " Below " is used for something at a lower level , without implying direct contact — ideal for minerals beneath the surface . Below means نیچے Under means اس کے تحت
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