2 years ago

Solve for the roots: x3-2x2+3x-6

Mathematics

2 answers:

Levart [38]2 years ago

7 0

x^3 - 2x^2+ 3x - 6 = 0

Hint: Solve by grouping.

forsale [732]2 years ago

4 0

Answer:

x = 2, i $\sqrt[]{3}$ , -i $\sqrt{3}$

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Which of the following expressions correctly uses the properties of summations to represent

madam [21]

Answer:

Option C is correct.

$7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

Step-by-step explanation:

Given the expression: $\sum_{i=1}^{18} (7i^2+9)$

Using properties of summation:

$\sum_{i=1}^{n} (a+bi) =\sum_{i=1}^{n} a + \sum_{i=1}^{n} bi$

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Using properties of summation in the given expression we have;

$\sum_{i=1}^{18} (7i^2+9)$

= $\sum_{i=1}^{18} 7i^2 + \sum_{i=1}^{18} 9$

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Therefore, the following given expression uses the properties of summation to represents is, $7 \cdot \sum_{i=1}^{18} i^2 + 9 \cdot 18$

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Step-by-step explanation:

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