( (4a-5)2-\(16a^2+25\) ) का सरल रूप क्या है?
What is the simplified form of ( (4a-5)2-\(16a^2+25\) )?
Explanation opens after your attempt
B. (-40a)
Concept
The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.
Why this answer is correct
The correct answer is B. (-40a). The expansion is \(16a^2-40a+25\), so like terms cancel leaving (-40a). Exam tip: do not forget the negative middle term.
Exam Tip
विस्तार \(16a^2-40a+25\) है इसलिए समान पद घटकर (-40a) बचता है। परीक्षा में ऋणात्मक मध्य पद न भूलें।
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