I'm guessing that you want to calculate the middle horizontal line.
The upper left triangle on the left is a 45 45 90 triangle.
The hypotenuse is 12 and so the leg is 12 * (1/square root of 2)
leg = 12 *
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0.7071067812
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leg =
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8.4852813742
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So that means the line =
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16.9705627485
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Your answer is: −4(x−3)(3x+1)
Because the number you provided is negative, we won't get a real answer instead a complex answer.
Now simplify the square root.
To simplify a square root, find two factors where one of the factors is a perfect square.
4, 16
-1, 1
3, 9
12, 144
16, 256
The rule is y=x^2. If you square all the numbers on the x side, you will get the numbers on the y side. 4 times 4 = 16. -1 times -1 =1. 3 times 3 =9, and so on.