trig help

Submitted by yankee on 20. May 2007 - 14:52.

Trigonometry help

Multiple choice The roots of 4x to the 2nd + 4x + C = 0 are equal when C is (1) 1 (2) -1 (3) -4 (4) 4

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Roots are equal when

Submitted by Tutor on 21. May 2007 - 7:56.

Roots are equal when discriminant is equal to zero so Discriminant for the above is 4^2-4*4*C=0 Solve this for C to get answer C=1

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