Verify whether the indicated number is zero of the polynomial given
$g (x) = 5 x - 8, x = \frac{4}{5}$

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Solution

In the given polynomial $g (x) = 5 x - 8$ , substitute $x = \frac{4}{5}$ as shown below:

$g (x) = (5 \times \frac{4}{5}) - 8 = 4 - 8 = - 4 \neq 0$

Hence the indicated number is not zero of the polynomial $g (x) = 5 x - 8$ .

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Verify whether the indicated number is zero of the polynomial giveng(x)=5x−8,x=45

In the given polynomial g(x)=5x−8, substitute x=45 as shown below: g(x)=(5×45)−8=4−8=−4≠0 Hence the indicated number is not zero of the polynomial g(x)=5x−8.

Verify whether the indicated number is zero of the polynomial given
$g (x) = 5 x - 8, x = \frac{4}{5}$

In the given polynomial $g (x) = 5 x - 8$ , substitute $x = \frac{4}{5}$ as shown below:

$g (x) = (5 \times \frac{4}{5}) - 8 = 4 - 8 = - 4 \neq 0$

Hence the indicated number is not zero of the polynomial $g (x) = 5 x - 8$ .