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tatyana61 [14]
3 years ago
6

How to factorise 8a3-b3​

Mathematics
2 answers:
olasank [31]3 years ago
7 0

Answer:

(2a - b)(4a² + 2ab + b²)

Step-by-step explanation:

8a³ - b³ ← is a difference of cubes and factors in general as

a³ - b³ = (a - b)(a² + ab + b²) , thus

8a³ - b³

= (2a)³ - b³

= (2a - b)((2a)² + 2ab + b² ), that is

(2a - b)(4a² + 2ab + b²)

max2010maxim [7]3 years ago
5 0

Answer:

Step-by-step explanation:

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Please help.. nobody will help me and I’ve been asking this question so many times but nobody will answer..
lisov135 [29]

Answer:

The floor covers 81yd^{2}

Step-by-step explanation:

This question is actually easier than you think, but I am here to help.

First off you know the room is a square. All squares have equal sides no matter what, that is the number 1 basic rule. (27ft by 27ft)

1. Find the area of the square: To find area you multiply Length by Width. Since you are multiplying two units you will get a squared value. The square measures 27 ft by 27 ft on both sides.

Lets multiply those two numbers:

(27 * 27) = 729ft^{2}

We need to stay in the same unit because you are multiplying two values of the same unit. The total square feet of the room is 729ft^{2}

2. Next, all you need to do is convert ft^{2} to yd^{2}

Like you mentioned: (1 yd^{2}  = 9ft^{2})

Now lets create a proportion between the two unit:

\frac{729ft^{2} }{1} * \frac{1yd^{2} }{9ft^{2} }

The ft^{2} unit cross cancels and your left with yd^{2}.

Now all you do is multiply straight across and you get \frac{729yd^{2} }{9}  = 81 yd^{2}

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4 years ago
A caterer charges the same price for each wrap orderd.each bottle of water is also the same price. The cost of buying 50 wraps a
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Answer:it’s in the explanation

Step-by-step explanation:

a. Each wrap costs $2.00, and each bottle of water costs $6.50.
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8 0
3 years ago
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In a cinema theatre, why do we normally not hear echoes even though the sounds are loud?<br>​
ikadub [295]

Answer:

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3 years ago
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earnstyle [38]

Answer:

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3 years ago
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