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if c is -1 the equation should be
4x² + 4x -1 = 0
not plus 1
I assume you want the coordinates of the zeros.
if c is indeed -1, they are at (-1.207 , 0) and (0.207 , 0)
if c is +1, as in the equation the only zero point is at (-0.5 , 0)
see screenshot for illustration
Answer:

Step-by-step explanation:
we know that
The circumference of a circle is equal to

we have
<em>Circle X</em>


<em>Circle Y</em>

Find the radius ry
we know that

substitute the value of Cy


Remember that the value of rx is 
substitute

i am not sure but i think that it is B