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Solve the equation 2x² + 17x + 44 = -15x - 100 in a+bi form.

A) x = 3 + 4i
B) x = -3 - 4i
C) x = 7 - 8i
D) x = -7 + 8i

User Hmallett
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1 Answer

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Final answer:

The equation 2x² + 17x + 44 = -15x - 100 leads to a quadratic in the form of 2x² + 32x + 144 = 0. Using the quadratic formula, we find complex solutions x = -8 + 2√2i and x = -8 - 2√2i, which are not listed in the provided options.

Step-by-step explanation:

To solve the equation 2x² + 17x + 44 = -15x - 100 we first need to move all terms to one side of the equation to get it into standard quadratic form, ax² + bx + c = 0. Combining like terms, we have:

2x² + 17x + 15x + 44 + 100 = 0

2x² + 32x + 144 = 0

Now we use the quadratic formula, which is x = (-b ± √(b² - 4ac)) / (2a), where a = 2, b = 32, and c = 144.

The solutions will be:

x = (-32 ± √(32² - 4 × 2 × 144)) / (2 × 2)

x = (-32 ± √(1024 - 1152)) / 4

x = (-32 ± √(-128)) / 4

Since the discriminant (inside the square root) is negative, we will have complex solutions. We can write √(-128) as √(128) × i, where √(128) = 8√2, so:

x = (-32 ± 8√2i) / 4

The final answer will be:

x = -8 ± 2√2i

This means the equation does not have real solutions but it has two complex solutions given by x = -8 + 2√2i and x = -8 - 2√2i which don't match any of the options A through D provided.

User Michael Herrmann
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