Just replace 'x' with -2 and calculate...
(-2)^3 -2(-2) = f(-2)
-8 +4 = -4
3/4 x + 3 = 7/10 Find the LCD of the fractions..... 20 in this case Multiply through by 20
(20) 3/4 x + 3(20) = (20)7/10
15 x +60 = 14
Tan 17degrees = .3057 = 9/x x= 29.44
10 x (3 -- 4 ) = 30 to 40 minutes
Just use a calculator to find (unless you know )
arcsin (-1/2) = -30 or 210 degrees
arc cos (sqrt2 *3) is invalid
Arccos(sqrt(3)/2) is also 30 degrees which is pi/6 radians ( or - pi/6 radians also)
Here is the graph:
Expand to x^2+7.5x - 38.5 > 0 Use quadratic formula to find x = -11 and 3.5
These are the zeros of a normally upright parabola.....so x outside of these numbers, the fxn would be > 0
BETWEEN ( & including the values) the values of the function are zero or negative
so -11 >x>3.5
If you use the quadratic formula to solve for this quadratic....you will see that when the term
sqrt(b^2-4ac) is equal to ZERO , you will have only ONE x root
so n^2 - 4(1)(9) = 0 Solve for n
n^2 = 36
n = 6
(x+6)(x+7) = factored form
