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CBSE Class 10 Answered

can you please tell me how the circled number is not found in the next step
question image
Asked by acshanadhana15 | 14 Oct, 2020, 11:02: AM
answered-by-expert Expert Answer
In a particular step, we have ,  -4( a2 d2 + b2 c2 - 2abcd ) = 0
 
above expression can be writtena s,  -4 ( ad - b c)2 = 0
 
Since bracketed algeberic term is multiplied by a constant (-4) and the product is zero , we get (ad - bc)2 = 0
 
Hence -4 is not considered for next step.
Answered by Thiyagarajan K | 14 Oct, 2020, 09:14: PM
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