Question

Solve X2-5 x-10=0
by
using
quadratic formula and
give a your
answer Colret
to two decimal places​

Answer 1

$\tt{ {x}^{2} - 5x - 10 = 0 }$

Method : quadratic formula

$\bf{formulae \: : x = \frac{ - b \frac{ + }{} \sqrt{ {b}^{2} - 4ac } }{2a} }$

$\bf \green{a = 1 \: and \: b = - 5 \: and \: c = - 10}$

$\bf{x= \frac{ - ( - 5) \frac{ + }{} \sqrt{ {( - 5)}^{2} - 4(1)( - 10) } }{2 \times 1} }$

$\bf{}$

$\bf{x = \frac{ + 5 \frac{ + }{} \sqrt{ {25} - 40 } }{2} }$

$\bf{x = \frac{ + 5 \frac{ + }{} \sqrt{ 15 } }{2} }$

Hope you got your answer.