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2 years ago

Solve the following quadratic equations using factoring. C. X^2-10=9x

Mathematics

1 answer:

boyakko [2]2 years ago

8 0

we can easily solve this one by splitting theiddle term

x2 - 9x -10

x2 -10x + x - 10

x(x - 10) 1( x - 10)

(x + 1) (x-10)

x = -1 or 10

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Given 2x² = -8, x is .

sertanlavr [38]

Answer:

The values of x are : $2i$ and $-2i$

Step-by-step explanation:

Given equation is: $2x^2= -8$

First, we will divide both sides by 2 for getting rid of that 2 from the left side. So........

$\frac{2x^2}{2}= \frac{-8}{2} \\ \\ x^2=-4$

Now, we need to take square root on both sides. So, we will get......

$\sqrt{x^2}= \pm \sqrt{-4} \\ \\ x=\pm \sqrt{4(-1)} \\ \\ x=\pm 2\sqrt{-1}= \pm 2i$

(Replacing $\sqrt{-1}$ as $i$ )

So, the solutions are: $x= 2i, -2i$

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3 years ago

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hichkok12 [17]

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5 0

2 years ago

Read 2 more answers

In the diagram of circle o, what is the measure of ZABC? O 30° O 40° O 50° O 60

denpristay [2]

Answer:

30°

Step-by-step explanation:

Line AB and BC are tangents to the given circle.

$\angle \: ABC = \frac{1}{2} ( 210 - 150)$

$\angle \: ABC = \frac{1}{2} (60) = 30 \degree$

Alternatively, <ABC and <AOC are supplementary because AB and BC are tangents.

$\angle \: ABC + 150 \degree = 180 \degree$

$\angle \: ABC = 180 \degree - 150 \degree = 30 \degree$

The correct choice is A.

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2 years ago

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Vanyuwa [196]

Answer:

676 cubic cm choice d

Step-by-step explanation:

Base area times height gets volume

Base area = (1/2)*13 * 8 = 52 sq. cm (area of the right triangle)

height = 13 cm here

Volume = 13 cm * 52 sq. cm = 676 cubic cm

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