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3 years ago

What is the product of (5-2i)(3i)?

Mathematics

2 answers:

lora16 [44]3 years ago

6 0

Search it up on safari and you’ll find the answer

Tcecarenko [31]3 years ago

5 0

Answer:

15i + 6

Step-by-step explanation:

Multiply. Note that:

i * i = i² = -1

Use the FOIL method.

Distribute 3i to all terms within the first parenthesis:

5 * 3i = 15i

-2i * 3i = -6i² = -6 * -1 = 6

15i + 6 is your answer.

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2 years ago

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Complete the square to factor X^2 +10X=-8

ella [17]

Answer: $x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$

Step-by-step explanation:

Alright, lets get started.

The given equation is :

$x^{2} +10x = -8$

Adding 8 in both sides, it will become

$x^{2} +10x + 8 = -8 +8$

$x^{2} +10x + 8 = 0$

To make it perfect square, we need to add 25 and subtract 25

$x^{2} +10x + 8 +25-25= 0$

$x^2+10x+25+8-25=0$

$(x+5)^2+8-25=0$

$(x+5)^2-17=0$

Adding 17 in both sides

$(x+5)^2=17$

taking square root

$x+5=\sqrt{17}$

So,

$x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$ .. Answer

Hope it will help :)

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3 years ago

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Which ratio is equivalent to 4/9

Dmitrij [34]

Answer:

D. 12/27

Step-by-step explanation:

Ratios are just like fractions

12 ÷ 3 = 4

27 ÷ 3 = 9

4/9 is 12/27 simplified by 3

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Which are the possible side lengths of a triangle

Scorpion4ik [409]

Answer:

The sum of the lengths of any two sides of a triangle is greater than the length of the third side.

Step-by-step explanation:

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4 years ago