Math, asked by mr1233, 11 months ago

If one of zero of the quadratic. Polynomial f(x),= 4x^2_8kx +8x+2 is negative of the other then find the zeroes of kx^2+3kx+2​

Answers

Answered by rakhithakur
9
It is given that one zero of the quadratic polynomial fx=4x2-8kx+8x-9 is negative of the other. Let the roots be 'α'  and '-α' Then the sum of roots is,    
α+-α= - coefficient  of  x coefficient  of  x2 This gives,    
 α-α= -- 8k+84        
   0= -2k+2     
  2k=2         
 k=1 Put this value of k in the polynomial   kx2+3kx+2 to get
x2+3x+2 Find the zeroes of this polymial  as follows:            
  x2+3x+2=0      
   x2+2x+x+2=0  
xx+2+1x+2=0        
   x+1x+2=0
This gives,
   x+1=0 
 or 
x+2=0   
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