Question

factorise
${x}^{2} + 5x - 84$
​

Answer 1

Step-by-step explanation:

${x}^{2} + 5x - 84$

$= {x}^{2} + (12 - 7)x - 84$

$= {x}^{2} + 12x - 7x - 84$

$= x(x + 12) - 7(x + 12)$

$= (x + 12)(x - 7)$

Answer 2

Refer to the attached image ❤