#### Answer

$z_{1}=\frac{3}{4}$
$z_{2}=-6$

#### Work Step by Step

$4z^{y}+21z-18=0$
$(4z-3)+(z+6)=0$
________________________
1.)
$4z-3=0$
$4z=+3$
$z=\frac{3}{4}$
2.)
$z+6=0$
$z=-6$

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Published by
McDougal Littell

ISBN 10:
0618595414

ISBN 13:
978-0-61859-541-9

$z_{1}=\frac{3}{4}$
$z_{2}=-6$

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