Question 1. Write the following quadratic equations in the standard form and point out pure quadratic equations. $ \pmb{ (i). \;\;\;\;\; (x + 7) (x – 3) = -7} $ Solution: The given quadratic equation is $$ (x + 7) (x – 3) = -7 \;\;\;\;\; (i) $$ Multiplying the expressions $ (x + 7) $ and $ (x – ...

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## Solution of Quadratic Equation by factorization

In this method, write the quadratic equation in the standard form as ax2 + bx + c = 0 (i) If two numbers r and s can be found for the equation (i) such that r + s = b and rs = ac then ax2 + bx + c can be factorized into two linear factors. Example Solve the ...

Read More »## Solution of Quadratic Equation by Completing Square

To solve a quadratic equation by the method of completing square is illustrated through the following examples. Example Solve the equation x2 − 3x − 4 = 0 by completing square. Solution: x2 − 3x − 4 = 0 (i) Shifting constant term −4 to the right, we have x2 − 3x = 4 (ii) Adding the square of ...

Read More »## Solution of Quadratic Equations

To find the solution set of a quadratic equation, following methods are used: factorization completing square use of quadratic formula

Read More »## Quadratic Equations

An equation of 2nd degree is called quadratic equation. In more detail, the quadratic equation is an equation, which contains the square of the unknown (variable) quantity, but no higher power. General or standard form of a quadratic equation: A 2nd degree equation in one variable x of the form as below, where a ≠ 0 and a, b, c are ...

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