I suspect you would have no trouble understanding the situation if I gave you 4 stones,
4 shoes, 4 beers, 4 pencils, or 4 kittens.
Why is there total brain-freeze when you find yourself holding 4a in your hand ?
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x2=(4a)(a) x=√4a2 x=2a The geometric mean of a and 4a is 2a
If you mean: 4a +29 -3a -a +3a then it simplifies to 29 +3a
3A or 4A schools are about the size of the students. 4A schools have more students than a 3AM school
(4a)2 or 16a2
4a+2b+a