3 years ago

Factorise the following expressions m²-9n²

Mathematics

1 answer:

Mashcka [7]3 years ago

3 0

Answer:

(m - 3n)(m + 3n).

Step-by-step explanation:

This is the difference of 2 squares, so we use the identity:

a^2 - b^2 = (a - b)(a + b).

So m^2 - 9n^2

(m - 3n)(m + 3n).

You might be interested in

Thomas has $30 to spend at the amusement park. Rides cost $2 each and admission at the gate is $6. What is the maximum number of

Rudiy27

Answer:

B.2r+6=30

Explanation:

It costs $6 dollars just to get in. Subtract 6 from 30. 30-6=24

Divide 24 by 2. 24 divided by 2 equals 12.

7 0

3 years ago

Read 2 more answers

What is the following sum 3b^2

densk [106]

The given expression is $3b^2*(\sqrt[3]{54a}) + 3*(\sqrt[3]{2ab^6})$

This can be simplified as :

= $3*b^2*(\sqrt[3]{27 *2*a}) + 3*(\sqrt[3]{2*a*b^6})$

We know that: $\sqrt[3]{27} = 3$

Similarly we also can simplify: $\sqrt[3]{b^6} = b^2$

So our expression will look like this:

= $3*3*b^2*(\sqrt[3]{2a}) + 3*b^2*(\sqrt[3]{2a})$

= $9b^2*(\sqrt[3]{2a}) + 3b^2*(\sqrt[3]{2a})$

= $\sqrt[3]{2a}*(9b^2 + 3b^2)$

= $\sqrt[3]{2a}*(12b^2)$

This can also be written as:

$12b^2(\sqrt[3]{2a})$

So the Answer is Option B

6 0

2 years ago

Read 2 more answers

Somebody help <br> Does this graph represent a function?

sasho [114]

Answer:

Step-by-step explanation:

<em>it passes the vertical line test.<3</em>

5 0

2 years ago

How is the graph of y= 1/3x related to its parent function y=1/x

V125BC [204]

B it is horizontally stretched by a factor of of 3 and reflected over the y

7 0

2 years ago

Read 2 more answers

Find the missing side length SH.<br> Round answer to nearest tenth.

ikadub [295]

66 degrees divided by 2= 33 degrees
Then, 22/2=11
11/sin(33)= 20.2

7 0

2 years ago

Read 2 more answers

Factorise the following expressions m²-9n²​

Factorise the following expressions m²-9n²