Question

1)Is x = -2 a solution of the equation x 2 -2x+8=0?

Answer 1

Answer:

Answer is in the attachment..

Answer 2

Step-by-step explanation:

$let \: f(x) = {x}^{2} - 2x + 8 \\ f( - 2) \: is \: a \: solution \: if \: f( - 2) = 0 \\ = > ( { - 2})^{2} - 2( - 2) + 8 = 4 + 4 + 8 = 16 \: which \: is \: not \: equal \: to \: 0 \: \\ so \: - 2 \: is \: not \: solution$