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How to Solve Quadratic Equations with Factorisation Video Lecture | Quantitative Aptitude for CA Foundation

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FAQs on How to Solve Quadratic Equations with Factorisation Video Lecture - Quantitative Aptitude for CA Foundation

1. What is the general form of a quadratic equation?
Ans.The general form of a quadratic equation is \( ax^2 + bx + c = 0 \), where \( a \), \( b \), and \( c \) are constants, and \( a \neq 0 \).
2. How do you factor a quadratic equation?
Ans.To factor a quadratic equation, you need to express it in the form \( (px + q)(rx + s) = 0 \). You can do this by finding two numbers that multiply to \( ac \) (the product of \( a \) and \( c \)) and add to \( b \).
3. What are the steps to solve a quadratic equation by factorisation?
Ans.The steps to solve a quadratic equation by factorisation are: 1. Write the equation in standard form \( ax^2 + bx + c = 0 \). 2. Factor the quadratic into the form \( (px + q)(rx + s) = 0 \). 3. Set each factor equal to zero and solve for \( x \).
4. Can all quadratic equations be solved by factorisation?
Ans.Not all quadratic equations can be solved by factorisation. Only those that can be expressed as a product of two binomials can be factored easily. If the roots are irrational or complex, other methods like completing the square or using the quadratic formula may be necessary.
5. What is the role of the discriminant in solving quadratic equations?
Ans.The discriminant, given by the formula \( D = b^2 - 4ac \), helps determine the nature of the roots of a quadratic equation. If \( D > 0 \), there are two distinct real roots; if \( D = 0 \), there is one real root (a repeated root); and if \( D < 0 \), the roots are complex (not real).
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