Question

verify whether the following are zeros of the polynomials p(x)=5x-4,x=4/5

Answer 1

$p(x) = 5x - 4 \\ if \: x = \frac{4}{5} \: then \\ p( \frac{4}{5}) = 5 \times \frac{4}{5} - 4 \\ = 4 - 4 \\ = 0$
$so \: \frac{4}{5} is \: the \: zero \: of \: p(x).$

Answer 2

p(4/5) = 5×4/5 - 4

= 20/5 - 4
= 4 - 4
= 0.

thus 4/5 is the zero of the polynomial