Q. Write the quadratic polynomial, the product and sum of whose zeroes are 2−9 and 2−3 respectively.
Identify Product and Zeroes: Identify the product and sum of the zeroes.The product of the zeroes P is given as −29, and the sum of the zeroes S is given as −23.
Write General Form: Write the general form of a quadratic polynomial.The general form of a quadratic polynomial with zeroes α and β is p(x)=k(x−α)(x−β), where k is a constant.
Use Coefficients Relationship: Use the relationship between the coefficients and the zeroes.For a quadratic polynomial p(x)=ax2+bx+c, the sum of the zeroes is −ab and the product of the zeroes is ac. Here, we have S=−ab and P=ac.
Substitute Given Values: Substitute the given values of P and S into the relationships.We have S=2−3 and P=2−9. Therefore, −ab=2−3 and ac=2−9.
Write Quadratic Polynomial: Write the quadratic polynomial using the values of P and S. Since k is a constant, we can choose k=1 for simplicity. Thus, the quadratic polynomial is p(x)=x2−Sx+P.
Substitute Values: Substitute the values of S and P into the polynomial.p(x)=x2−(2−3)x+(2−9)
Simplify Polynomial: Simplify the polynomial. p(x)=x2+(23)x−(29)
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