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Volgvan
2 years ago
10

The area of a square room is 16x^2+72x+81. what is the length of one side of the room

Mathematics
1 answer:
maxonik [38]2 years ago
4 0
To find this you know that the A of a square = s^2

So the length of one side equals s =  \sqrt{16 x^{2} +72x+81}

Since this is a perfect square, it would equal A = (4x+9)^{2}

And s =  \sqrt{(4x+9)^{2}} = 4x+9

Also you know it is a perfect square because the first and last terms are perfect squares :) :D
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