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ICSE Class 9 Answered

x4+5x2+9
Asked by nareshmihijam | 20 Jul, 2021, 09:09: PM
Expert Answer
straight x to the power of 4 plus 5 straight x squared plus 9 equals 0
put space straight x squared equals straight t
straight t squared plus 5 straight t plus 9 equals 0
use space the space formula
straight t equals fraction numerator negative straight b plus-or-minus square root of straight b squared minus 4 ac end root over denominator 2 straight a end fraction
straight b squared minus 4 ac space equals space 25 space minus space 4 cross times 9 space equals negative 11
No space roots
Answered by Arun | 21 Jul, 2021, 10:01: AM
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