Answer:
(x-5) (x+4)
Step-by-step explanation:
x^2-x-20
What two terms multiply to -20 and add to -1
-5*4 = -20
-5+4 = -1
(x-5) (x+4)
Given the quadratic equation:

Using the general solution for quadratic equations:

From the problem, we identify:

Then:

And the solution set is:
Hello,
a) k=8+6=14 cm
b)
AC=√(8²+6²)=10
or AC=√(8²-6²)=√28=2√7=5,29150...
The integer is always negative or a fraction