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Rima wrote
aaa\((x+4)^2\) as \(x^2+16\). Which term is missing from her expansion?रीमा ने
aaa\((x+4)^2\) को \(x^2+16\) लिखा। उसके विस्तार में कौन-सा पद छूट गया है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 8x8x
Use the identity
aaa\((a+b)^2=a^2+2ab+b^2\). Here, \(2\times x\times4=8x\), so the expansion is \(x^2+8x+16\). Writing \(4x\) misses the factor 2; always check the middle term.पहचान
aaa\((a+b)^2=a^2+2ab+b^2\) लगाएँ। यहाँ \(2\times x\times4=8x\), इसलिए सही विस्तार \(x^2+8x+16\) है। \(4x\) लेना सामान्य गलती है; \(2ab\) को न भूलें।
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