Polynomials · 4 min · English / हिन्दी

Expressions in α and β

Name: α और β के व्यंजक
Uploaded: 2026-10-01
Duration: 4 min
Description: Expressions in α and β (α और β के व्यंजक): a 4-minute blackboard lesson for CBSE Class 10 Polynomials, in English and हिन्दी, with 5 practice questions.

α और β के व्यंजक

Lesson language · भाषा

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In this lesson

Summary

The idea: $\alpha^2+\beta^2=(\alpha+\beta)^2-2\alpha\beta$
More expressions: $\dfrac{1}{\alpha}+\dfrac{1}{\beta}=\dfrac{\alpha+\beta}{\alpha\beta}$
Example 1: $\alpha^2+\beta^2=13$ ✓
Example 2: $x^2-\dfrac{4}{3}x+\dfrac{1}{3}=0$ or $3x^2-4x+1=0$ ✓
Careful: First, remember the formulas.
Your turn: $\dfrac{1}{\alpha}+\dfrac{1}{\beta}=\dfrac{7}{5}$ ✓

हिन्दी में सारांश

मूल विचार: $\alpha^2+\beta^2=(\alpha+\beta)^2-2\alpha\beta$
और व्यंजक: $\dfrac{1}{\alpha}+\dfrac{1}{\beta}=\dfrac{\alpha+\beta}{\alpha\beta}$
उदाहरण 1: $\alpha^2+\beta^2=13$ ✓
उदाहरण 2: $x^2-\dfrac{4}{3}x+\dfrac{1}{3}=0$ या $3x^2-4x+1=0$ ✓
सावधान: पहली, सूत्र याद रखिए।
अब आपकी बारी: $\dfrac{1}{\alpha}+\dfrac{1}{\beta}=\dfrac{7}{5}$ ✓

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