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CBSE Class 10 Answered

4x2-2(a2-b2)x+a2b2=0.solve eqn by completing square method.   
Asked by mayankgoransh0564 | 13 Jun, 2019, 09:14: PM
answered-by-expert Expert Answer

The question should be like 

4x2-2(a2+b2)x+a2b2=0.solve eqn by completing square method. 

 

4x2 - 2(a2 + b2)x + a2b2 = 0
4[x2 - (a2 + b2)x/2 + a2b2/4] = 0
begin mathsize 16px style 4 open square brackets straight x squared minus fraction numerator straight a squared plus straight b squared over denominator 2 end fraction straight x plus open parentheses fraction numerator straight a squared plus straight b squared over denominator 4 end fraction close parentheses squared plus fraction numerator straight a squared straight b squared over denominator 4 end fraction minus open parentheses fraction numerator straight a squared plus straight b squared over denominator 4 end fraction close parentheses squared close square brackets equals 0
4 open square brackets open parentheses straight x minus fraction numerator straight a squared plus straight b squared over denominator 4 end fraction close parentheses squared minus open parentheses fraction numerator straight a squared minus straight b squared over denominator 4 end fraction close parentheses squared close square brackets equals 0
open parentheses straight x minus fraction numerator straight a squared plus straight b squared over denominator 4 end fraction close parentheses squared minus open parentheses fraction numerator straight a squared minus straight b squared over denominator 4 end fraction close parentheses squared equals 0
open parentheses straight x minus fraction numerator straight a squared plus straight b squared over denominator 4 end fraction close parentheses squared equals open parentheses fraction numerator straight a squared minus straight b squared over denominator 4 end fraction close parentheses squared
straight x minus fraction numerator straight a squared plus straight b squared over denominator 4 end fraction equals plus-or-minus fraction numerator straight a squared minus straight b squared over denominator 4 end fraction
straight x equals plus-or-minus fraction numerator straight a squared minus straight b squared over denominator 4 end fraction plus fraction numerator straight a squared plus straight b squared over denominator 4 end fraction
straight x equals straight a squared over 2 space or space straight b squared over 2 end style
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