Answer:
You can use the Pythagorean Theorem to find the length of the hypotenuse of a right triangle if you know the length of the triangle's other two sides, called the legs. You can use the Pythagorean Theorem to find a value for the length of c, the hypotenuse.
X²+15x+36<0
at first solve quadratic equation
D=b²-4ac= 225-4*1*36= 81
x=(-b+/-√D)/2a
x=(-15+/-√81)/2= (-15+/-9)/2
x1=(-15-9)/2=-12
x2=(-15+9)/2=-3
we can write x²+15x+36<0 as (x+12)(x+3)<0
(x+12)(x+3)<0 can be 2 cases, because for product to be negative one factor should be negative , and second factor should be positive
1 case) x+12<0, and x+3>0,
x<-12, and x>-3
(-∞, -12) and(-3,∞) gives empty set
or second case) x+12>0 and x+3<0
x>-12 and x<-3
(-12,∞) and (-∞,-3) they are crossing , so (-12, -3) is a solution of this inequality
12*123.9=1486.8
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4 2/3 divided by 2 3/6 divided with a calculator as a decimal would be 1.86666666667
<h2>
Hello!</h2>
The answer is: 
<h2>
Why?</h2>
Quadratic function describes the graph of a parabola and they are formed by a quadratic term (
) a linear term (
) and a constant number (c). Quadratic terms have an exponent of 2 and linear terms have an exponent of 1.
For this situation, we have only the quadratic term () which is enough to know that there is a quadratic function.
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