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Question

If two of the zeros of the cubic polynomial ax3+bx2+cx+d are 0 then the third zero is 

(a) ba                 (b) ba          (c) ca      (d) da


Solution

Let the required  roots be p ,q ,r 
let the two roots  let p and q be 0     (given)
we know that  sum of roots = -b/a
  p + q + r = -b/a
  0 + 0 + r = -b/a
  r = -(b/a) 
so option a is correct


Mathematics
Secondary School Mathematics X
Standard X

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