Question 416461
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Hi
 {{{(-6z)^2 = 36z^2}}}
 {{{-6z^2 = -6z^2}}}
If by 'and' You meant to add them:  30z^2 would be the result of adding them

absolute value of -7/4 or |-7/4| is 7/4.  Absolute value reflecting the
distance from zero on the number line.  For ex |7/4| = 7/4  as well.
{{{number_line( 600, -5, 5, -7/4, 7/4)}}}