SA3 marksYear: 2023MediumCBSE Class 10
quadratic-equationsrootssum-product-relation
Question
If α and β are roots of the quadratic equation x2−7x+10=0, find the quadratic equation whose roots are α2 and β2.
Solution
1
From x2−7x+10=0: α+β=7, αβ=10.
+0.5 marks2
α2+β2=(α+β)2−2αβ=49−20=29.
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α2β2=(αβ)2=(10)2=100.
+1 mark4
Quadratic equation with roots α2, β2: x2−(α2+β2)x+α2β2=0, i.e., x2−29x+100=0.
+0.5 marks