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20-09-2016
Mathematics

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If 4a^2 = 144 then a is?

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Аноним Аноним

20-09-2016

4a²=144
a²=144/4
a²=36
a=⁺₋√36
a=⁺₋6

Answer: we have two values for a; a=-6; and a=6

we check it out:
if a=-6
4(-6)²=4*36=144

if a=6
4(6)²=4*36=144

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