( (x-4)2=x-2-8x+16 ) में (-8x) कैसे आया?
How does (-8x) appear in ( (x-4)2=x-2-8x+16 )?
Explanation opens after your attempt
C. \(-2\cdot x\cdot4\) सेFrom \(-2\cdot x\cdot4\)
Concept
In the minus square identity, the middle term is (-2ab). Here \(-2\cdot x\cdot4=-8x\).
Why this answer is correct
The correct answer is C. \(-2\cdot x\cdot4\) से / From \(-2\cdot x\cdot4\). In the minus square identity, the middle term is (-2ab). Here \(-2\cdot x\cdot4=-8x\).
Exam Tip
घटाव वाली वर्ग सर्वसमिका में बीच का पद (-2ab) होता है। यहाँ \(-2\cdot x\cdot4=-8x\) है।
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