Please help me on #37. I know for A you would use the quadratic equation but I got the wrong answer.

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12-02-2014
Mathematics

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Please help me on #37. I know for A you would use the quadratic equation but I got the wrong answer.

Sagot :

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Crisforpidn Crisforpidn · Answer 1 · 2014-02-13T03:26:33-05:00

Crisforpidn Crisforpidn

13-02-2014

Δ = (8i)^2 - 4*(-25) => Δ = -36 +100 => Δ = 64 => x1 =(-8i + 8)/2 => x1 = -4i +4;
x2 = (-8i - 8)/2 => x2 = -4i-4; in this case, your solutions are complex conjugates.

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