y=3x^2+3x-3

I have to options

Option #1

x=????? simplify you answer. type an exact answer using radicals as needed. Use a comma to separate answers as needed.

Option #2

??? They are no x-intercepts

Only one option is allowed

y=3x^2+3x-3

I have to options

Option #1

x=????? simplify you answer. type an exact answer using radicals as needed. Use a comma to separate answers as needed.

Option #2

??? They are no x-intercepts

Only one option is allowed

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Scottsdale, AZ

Solve 3x^2+3x-3 = 0

Dividing each term by 3,

x^2+x-1 = 0

Method 1. Completing the square

=> (x+1/2)^2 = 1+1/4 = 5/4

x = -(1/2) ± √(5)/2 <==Answer

Method 2. Using quadratic formula

x = (-1±√(1+4))/2 = -(1/2) ± √(5)/2<==Same answer

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