
Nataliya D. answered 03/24/13
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6z2 + 4 = 220
6z2 = 220 - 4
6z2 = 216
z2 = 216/6
z2 = 36
z = ± √36 ---> z = ±6
Moriah R.
asked 03/24/13use square root method to solve
Nataliya D. answered 03/24/13
Patient and effective tutor for your most difficult subject.
6z2 + 4 = 220
6z2 = 220 - 4
6z2 = 216
z2 = 216/6
z2 = 36
z = ± √36 ---> z = ±6
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