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2 years ago

Factorise fully the following: a) 3x^3-9x b) 4x^2+28^3

Mathematics

1 answer:

Leokris [45]2 years ago

3 0

Answer:

3 x(x^2-3)

4x(x^2+5488)

Step-by-step explanation:

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-2/x^2-4 + x-1/x^2-2x

Fiesta28 [93]

Answer:

I need help with this too

Step-by-step explanation:

8 0

3 years ago

(x-4)/5=9-(2x-41)/9

jok3333 [9.3K]

For this question, you have to take Least Common Multiplier for which in this case will be "45" as, the denominators can get similar and get multiplied by a same value to form a similar expression. This allows us to cancel out them by common factors. Full process shown below.

$\mathbf{Given \: \: Expression: \: \dfrac{x - 4}{5} = 9 - \dfrac{2x - 41}{9}}$

$\mathbf{\dfrac{x - 4}{5} \times 45 = 9 \times 45 - \dfrac{2x - 41}{9} \times 45}$

$\mathbf{9(x - 4) = 405 - 5 (2x - 41)}$

$\mathbf{9x - 36 = 405 - 10x + 205}$

$\mathbf{9x - 36 = - 10x + 610}$

$\mathbf{9x - 36 + 36 = - 10x + 610 + 36}$

$\mathbf{9x = - 10x + 646}$

$\mathbf{9x + 10x = - 10x + 646 + 10x}$

$\mathbf{19x = 646}$

$\mathbf{\dfrac{19x}{19} = \dfrac{646}{19}}$

$\mathbf{\therefore \quad x = 34}$

$\boxed{\mathbf{\underline{\therefore \quad Final \: \: Answer \: \: is; \: \: x = 34}}}$

Hope it helps.

3 0

2 years ago

each homeroom of reedurban middle school receives 1/12 acre plot of the land shown. how many homerooms receive a plot of land?

Andrei [34K]

I probably did this wrong but i think its 21780.....cause i timed an acre by 1/2 to get that answer

7 0

3 years ago

Evaluate 6 • 3 ÷ start root 9 end root – 1. A. 2 B. 3 C. 5 D. 6

Alborosie

6 * 3 / sqrt9

Using PEMDAS, solve SQRT first.

6 * 3 / 3

Using PEMDAS, solve 6 * 3.

18 / 3

Solve.

Your answer is 6.

7 0

2 years ago

Read 2 more answers

How many centimeters across a handprint?

lara [203]

Answer:

10.16cm

Step-by-step explanation:

8 0

3 years ago