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Write the quadratic polynomial, the product and sum of whose zeroes are (-9)/(2) and 
(-3)/(2) respectively.

Write the quadratic polynomial, the product and sum of whose zeroes are 92 \frac{-9}{2} and 32 \frac{-3}{2} respectively.

Full solution

Q. Write the quadratic polynomial, the product and sum of whose zeroes are 92 \frac{-9}{2} and 32 \frac{-3}{2} respectively.
  1. Identify Product and Zeroes: Identify the product and sum of the zeroes.\newlineThe product of the zeroes PP is given as 92-\frac{9}{2}, and the sum of the zeroes SS is given as 32-\frac{3}{2}.
  2. Write General Form: Write the general form of a quadratic polynomial.\newlineThe general form of a quadratic polynomial with zeroes α\alpha and β\beta is p(x)=k(xα)(xβ)p(x) = k(x - \alpha)(x - \beta), where kk is a constant.
  3. Use Coefficients Relationship: Use the relationship between the coefficients and the zeroes.\newlineFor a quadratic polynomial p(x)=ax2+bx+cp(x) = ax^2 + bx + c, the sum of the zeroes is ba-\frac{b}{a} and the product of the zeroes is ca\frac{c}{a}. Here, we have S=baS = -\frac{b}{a} and P=caP = \frac{c}{a}.
  4. Substitute Given Values: Substitute the given values of PP and SS into the relationships.\newlineWe have S=32S = \frac{-3}{2} and P=92P = \frac{-9}{2}. Therefore, ba=32-\frac{b}{a} = \frac{-3}{2} and ca=92\frac{c}{a} = \frac{-9}{2}.
  5. Write Quadratic Polynomial: Write the quadratic polynomial using the values of PP and SS. Since kk is a constant, we can choose k=1k = 1 for simplicity. Thus, the quadratic polynomial is p(x)=x2Sx+Pp(x) = x^2 - Sx + P.
  6. Substitute Values: Substitute the values of SS and PP into the polynomial.p(x)=x2(32)x+(92)p(x) = x^2 - \left(\frac{-3}{2}\right)x + \left(\frac{-9}{2}\right)
  7. Simplify Polynomial: Simplify the polynomial. p(x)=x2+(32)x(92)p(x) = x^2 + \left(\frac{3}{2}\right)x - \left(\frac{9}{2}\right)

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