Question

factorise 3x
$3 {x}^{2} - x - 4$
​

Answer 1

Question:-

Factorise 3x² - x - 4

Solution:-

a = 3 ; b = -1 ; c = -4

$➣ \frac{ - b \: ± \: \sqrt{ {b}^{2} - 4ac } }{2a}$

$➣ \frac{ - ( - 1) + \sqrt{ { - 1}^{2} - 4(3)( - 4)} }{2(3)}$

$➣ \frac{1 \: ± \sqrt{1 + 48} }{6}$

$➣ \frac{1 \: ± \: \sqrt{49} }{6}$

$➣ \frac{1 \: ± \: 7}{6}$

$➣ \frac{8}{6}$

$➣ \frac{4}{3}$

And

➣ (1 - 7)/6

➣ 6/6

➣ 1

The roots of the equation are 4/3 and 1.

Answer 2

Combine exponents

$3 \: 3 \: 2−−4$

$35−−4$

$35−−4$