Class VIII

pqr is what type of polynomial?
  1. Monomial
  2. Binomial
  3. Trimonial
  4. None of these
Which of the following is obtained by subtracting x2-y2 from y2 - x2?
  1. -2(x2-y2)
  2. -2(x2 + y2)
  3. 2(x2+ y2)
  4. 2(x2- y2)
What is the product of (x+a) and (x+b)?
  1. . x2+ (a-b)x + ab
  2. x2 + (a+b)x - ab
  3. x2 + (a+b)x - ab
  4. x2 + (a+b)x + ab
Which of the following is the value of (x+ 1/x)2?
  1. x2 + 1/x2
  2. x2 - 1/x2
  3. x2 + 1/x2 + 2
  4. x2+ 1/x2 + 2x
The expression 7xy has the factors
  1. 7,x,y
  2. x,y
  3. 7,x
  4. 7,y
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