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Ksenya-84 [330]
3 years ago
8

X-(2x+3) how to solve and why you change the sign for the +3?

Mathematics
2 answers:
alekssr [168]3 years ago
6 0

Answer:

-x - 3

Step-by-step explanation:

x-(2x + 3)

=> x-1(2x + 3)

=> x - 2x - 3

=> -x - 3

Therefore, this is the solution. Hoped this helped.

GeniusUser

Lina20 [59]3 years ago
4 0

Answer:

Step-by-step explanation:

x-(2x+3)

Notice that we can't further simplify the things in the bracket so we should multiply by -1

Technically this is like:

x - 1(2x+3)

-1 times 2x = -2x   , -1 times 3 is -3

= x - 2x - 3

= -x - 3

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(-3+2iroot48)(-5-4iroot12)
iVinArrow [24]

For this case we must simplify the following expression:

(-3 + 2i \sqrt {48}) (- 5-4i \sqrt {12})

Rewriting:

(-3 + 2i \sqrt {4 ^ 2 * 3}) (- 5-4i \sqrt {2 ^ 2 * 3}) =\\(-3 + 2 * 4i \sqrt {3}) (- 5-4 * 2i \sqrt {3}) =\\(-3 + 8i \sqrt {3}) (- 5-8i \sqrt {3}) =

We apply distributive property:

- * - = +\\- * + = -\\15 + 24i \sqrt {3} -40i \sqrt {3} - (8i \sqrt {3}) ^ 2 =\\15 + 24i \sqrt {3} -40i \sqrt {3} -64i ^ 2 * 3 =

We have toi ^ 2 = -1:

15 + 24i \sqrt {3} -40i \sqrt {3} + 192 =

Adding similar terms:

207-16i \sqrt {3}

Answer:

207-16i \sqrt {3}

7 0
3 years ago
The combined area of two squares is 45 square centimeters.each side of one square is twice as long as the side of the other .wha
serg [7]
Formula of square area
a = s²
thus, area of the first square could be written as s₁² and area of the second square could be written as s₂²

First, write an expression in the form of equation system
An expression for "The combined area of two squares is 45 square centimeters" is:
⇒ s₁² + s₂² = 45 <em>(first equation)</em>
An expression for "Each side of one square is twice as long as side of the other" is:
⇒ s₁ = 2s₂ <em>(second equation)</em>

Second, solve the equation system by substitution method.
⇒ We could substitute 2s₂ to s₁ (second equation) in the first equation in order to find the value of s₂
s₁² + s₂² = 45
(2s₂)² + s₂² = 45
(2²)(s₂)² + s₂² = 45
4s₂² + s₂² = 45
5s₂² = 45
s₂² = 45/5
s₂² = 9
s₂² = 3²
s₂ = 3

⇒ Substitute the value of s₂ to the second equation in order to find the value of s₁
s₁ = 2s₂
s₁ = 2(3)
s₁ = 6

The length of each side of the larger square is 6 centimeters
3 0
4 years ago
Plz someone help meeeee
yan [13]

Answer:

s ur e eye ge

Step-by-step explanation:

the answer is y = (6, 0) quadrant 1

3 0
3 years ago
What are 86.98 times 348.088 divided by 1,159,053
nadya68 [22]

0.02/ zero point zero two

4 0
3 years ago
Fifteen is less than or equal to a number minus 10
Levart [38]

Answer:

15 ≤ x - 10

Well, that's how you describe it, and I write it for you.

4 0
3 years ago
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