I hope this helps you
y-1=16x^2
x^2=y-1/16
x= square root of y-1/4
y^-1= square root of x-1/4
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The answer is C and D
First we must make one side of the equation zero, so we subtract 7 on both sides of the equation, making the equation 9x^2 - 6x - 6 = 0
Then we will use the quadratic formula to find the answers.
using the Quadratic Formula where:
a = 9, b = -6, and c = -6
and the formula is 6 +- 
P=7+7+12+12P=14+24P=38
See the attachment for diagram
Answer:
Because it only has one answer and there are no variety of answers.
hope this helps