Question

what metal guy what's to say ?​

Answer 1

Answer:

p(x)=x²+5x+7=0

on comparing with the general formula,

ax²+bx+c=0

here, a=1, b=5, c=7

Using the Quadratic formula,

$x = \frac{ - b± \sqrt{ {b - 4ac}^{2} } }{2a}$

On solving, D=b²–4ac

=(5)²–(4)(1)(7)

=25–28

=–3 , which is less than 0

so,

$x = \frac{ - 5 + \sqrt{ - 3} }{2} \: or \: \frac{ - 5 - \sqrt{ - 3} }{2}$

The roots are imaginary and are non real