Question

factrize 4x^2-7x-15​

Answer 1

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factorise 4x^2-7x-15

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$= > 4 {x}^{2} - 7x - 15 = 0$

$= > 4 {x}^{2} - 12x + 5x - 15 = 0$

$= > 4x(x - 3) + 5(x - 3) = 0$

$= > (4x + 5)(x - 3) = 0$

$= > 4x + 5 = 0$

$\bold{\red{= > x = - \frac{5}{4}}}$

$= > x - 3 = 0$

$\bold{\red{= > x = 3}}$

Hence ,the roots are -5/4 and 3

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