Question

Use the discriminant to determine the number of real solutions to the quadratic equation.

81d^2=18d+1=0

What is the number of real solutions?


Select the correct answer below:



0


1


2

Answer 1

The answer is 1

Use the discramnt formula

`{b {}^(2) - 4ac }`

Where a is 81, B is 18, and c is 1

We get

`18 {}^(2) - 4(81)(1)`

We then get 324-324=0

Which equal 0. Since the discramnt produce 0, the number of solution is one and repeated.