Question

Factorise : 3x^2-20x-63 by separating mid term

Answer 1

Answer:

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$\bf{3x^2 - 27x - 63}$

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solving By the splitting mid term

$\bf{3x^2 - 27x + 7x - 63}$

$\bf{3x^2 - 9\times{3} + 7x - 9\times7} = 0$

$\bf{3x (x- 9 ) + 7 (x - 9)}$

$\bf{(x - 9) (3x + 7))}$

$\bf{x = 9) ( x = - \frac{7}{3})}$

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