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julia-pushkina [17]
3 years ago
15

Simplify each expression by combining like terms -x+8x​

Mathematics
2 answers:
SOVA2 [1]3 years ago
8 0

Answer:

7x

Step-by-step explanation:

when you add -1 aka -x to 8 8x it takes away one, so 7x

zheka24 [161]3 years ago
7 0
The answer to your question is: 7x
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What is the simplified form of 3/4x+3+21/8x^2-14x-15
creativ13 [48]

Solution:

We have been asked to find the simplified expression of

3/4x+3+21/8x^2-14x-15=\frac{3}{4x+3} +\frac{21}{8x^2-14x-15}\\ \\ \text{We will have to make the denominator equal to add}\\ \\ \ 8x^2-14x-15=8x^2+6x-20x-15\\ \\ \ =2x(4x+3)-5(4x+3)=(4x+3)(2x-5)\\ \\  \frac{3}{4x+3} +\frac{21}{8x^2-14x-15}=\frac{3}{4x+3} +\frac{21}{(4x+3)(2x-5)}\\ \\ =\frac{3(2x-5)+21}{(4x+3)(2x-5)}\\ \\ =\frac{6x-15+21}{(4x+3)(2x-5)} \\ \\ =\frac{6x+6}{(4x+3)(2x-5)} \\

6 0
3 years ago
Which is bigger 0.18 or 0.8?
kolbaska11 [484]
0.18 is bigger because it is closer to 1 and 0.8 is closer to 0
7 0
4 years ago
Read 2 more answers
Factor the expression completely over the complex numbers.
nekit [7.7K]

Answer:

The factor form of given expression is (x-4)(x-2i)(x+2i).

Step-by-step explanation:

The given expression is

x^3-4x^2+4x-16

It can be written as

f(x)=x^3-4x^2+4x-16

According to the rational root theorem, all possible rational roots are in the form of

\frac{a_0}{a_n}

Where, a₀ is constant term and a_n is leading coefficient.

f(4)=4^3-4(4)^2+4(4)-16=0

Since the value of f(x) is 0 at x=4, therefore 4 is a root of the function and (x-4) is a factor of given expression.

Use synthetic method to find the remaining factors.

(x^3-4x^2+4x-16)=(x-4)(x^2+4)

(x^3-4x^2+4x-16)=(x-4)(x^2-(2i)^2)

(x^3-4x^2+4x-16)=(x-4)(x-2i)(x+2i)

Therefore the factor form of given expression is (x-4)(x-2i)(x+2i).

8 0
4 years ago
Read 2 more answers
The number 3.892 x 10/6 writing in standard
aniked [119]

To write the number is standard form we need to move the decimal point six times to the right, then:

3.892\times x10^6=3,892,000

therefore the answer is b.

3 0
1 year ago
What is the solution to this equation ?<br><br><br> x + 9 = -4
PolarNik [594]

Isolate the x. Note the equal sign. What you do to one side, you do to the other.

Subtract 9 from both sides

x + 9 (-9) = -4 (-9)

x = -4 - 9

x = -13

-13 is your solution

hope this helps

8 0
4 years ago
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