Question

QUADRATIC EQUATIONS
1.Solve the following quadratic equations by factorisation method:

x2 – 21x + 108 = 0
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Answer 1

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Answer 2

Answer:

The two zeros or roots of the equation are

x = 12, x = 9

Step-by-step explanation:

x² - 21x + 108 = 0

=> x² - 12x - 9x + 108 = 0

=> x ( x - 12x ) - 9 ( x - 12 ) = 0

=> ( x - 12 )( x - 12 ) = 0

=> x -12 = 0 => x - 9 = 0

=> x = 12 => x = 9

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