All categories

3 years ago

Factorise x^2-3xy-18y^2plzzzzz it's urgent

Mathematics

1 answer:

Alenkinab [10]3 years ago

3 0

Step-by-step explanation:

here,

x^2 -3xy-18xy^2

=x^2-(6-3)xy-18xy^2

=x^2-6xy+3xy-18y^2

=x(x-6y)+3y(x-6y)

=(x-6y)(x-3y)

You might be interested in

What is the length of the missing leg? If necessary, round to the nearest tenth.

KengaRu [80]

Answer:

a = 3.5

Step-by-step explanation:

Let's find 'a' using Pythagoras theorem.

=> 4² = 2² + a²
=> 16 = 4 + a²
=> 12 = a²
=> a = √12
=> a = √2 x 2 x 3
=> a = 2√3
=> a = 2 x √3
=> a = 2 x 1.732
=> a = 3.464 = 3.5 (Estimated)

Hoped this helped.

$BrainiacUser1357$

4 0

3 years ago

Use substitution to solve the system. X= ? Y= ? 5x+4y = -10 x = 3y+17

nikklg [1K]

Answer:

x=3.4

y=-6.75

Step-by-step explanation:

5x+4y=-10 (equation 1 )

-5x+3y=-17 (equation 2)

7y=-27

y=-6.75

substitution (equation 1 ) y=-6.75

5x-27=-10

5x=17

x=3.4

4 0

3 years ago

What is your number?

Goryan [66]

Answer:

13 and 11

Step-by-step explanation:

how is helpful

5 0

3 years ago

Read 2 more answers

Whats the answer to 15 3/4 ÷ 1 3/4 step by step

azamat

Answer:

Step-by-step explanation:

(15×4+3)/4 ÷(4×1+3)/4= 63/4 ÷ 7/4= 9

6 0

3 years ago

K=mv^2/2 solve for v

matrenka [14]

Answer: $v=\sqrt[]{\frac{2K}{m} }$

Step-by-step explanation:

$K=\frac{mv^2}{2}$

First, multiply by 2 to get rid of the 2 in the denominator. Remember that if you make any changes you have to make sure the equation keeps balanced, so do it on both sides as following;

$2*K=\frac{mv^2}{2}*2$

$2K=mv^2$

Divide by m to isolate $v^2$ .

$\frac{2K}{m}=\frac{mv^2}{m}$

$\frac{2K}{m} =v^2$

To eliminate the square and isolate v, extract the square root.

$\sqrt[]{\frac{2K}{m} }=\sqrt[]{v^2}$

$\sqrt[]{\frac{2K}{m} }=v$

let's rewrite it in a way that v is in the left side.

$v=\sqrt[]{\frac{2K}{m} }$

4 0

3 years ago

Factorise x^2-3xy-18y^2plzzzzz it's urgent​

Factorise x^2-3xy-18y^2plzzzzz it's urgent