You know 1 is not a root because the sum of the coeffcients of the equation is 14, not zero.
It is fairly easy to try 3 by synthetic division (see attachment), which tells you that 3 is a root and the remaining quadratic factor is x²-3x-5. The quadratic formula tells you the roots of that factor are
... x = (-b±√(b²-4ac))/(2a) = (3±√29)/2
The appropriate choices are
... C. (3-√29)/2
... D. (3+√29)/2
... F. 3
_____
The quadratic formula tells you the solution to
... ax²+bx+c=0
is x = (-b±√(b²-4ac))/(2a)
We have a=1, b=-3, c=-5.
The answer would be C
7/9 = 0.77777778
Step-by-step explanation:
2/4*4/8 can be simplified to 1/2*1/2, the product of which is 1/4! Multiply the numerators by each other and the denominators by each other. 1*1 is 1 and 2*2 is 4.
Remember that a fraction multiplied by another fraction is like dividing, the product will get smaller.
Multiplying something by 1/2 for example is like dividing by 2.
Hope this helped!