SA3 marksYear: 2025MediumCBSE Class 10
polynomialszeroessum-product-relation
Question
α and β are zeroes of a quadratic polynomial px2+qx+1. Form a quadratic polynomial whose zeroes are α2 and β2.
Solution
1
α+β=−pq, αβ=p1
+0.5 marks2
Sum of new zeroes =α2+β2=αβ2(α+β)=1/p2(−q/p)=−2q
+1 mark3
Product of new zeroes =αβ4=1/p4=4p
+1 mark4
∴ Required polynomial is x2+2qx+4p.
+0.5 marks