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Asked by Vikas Last Modified
Answer 
so as we knew 9+9=18 & 9*9=81
it means we can write it like this
or by taking common as follows we can write x(x+9)+9(x+9)=0
or (x+9)(x+9)=0
it means either x+9=0 or x+9=0 luckily both eqautions are same here
so it means x=-9,-9
the solution or the roots are -9 & -9.
By Rohit
M.Sc. from Univeristy of Delhi
dm me @ insta " csirnetcoachingclass "
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