#### Answer

$b=0$ and $c=-4$

#### Work Step by Step

$7x^2-4=0$
if $a=7$,
then $b=0$ and $c=-4$
because the standard form of the quadratic equation is:
$ax^2+bx+c=0$ when $a\ne 0$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$b=0$ and $c=-4$

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