All categories

3 years ago

I need the answer fore both plsss

Mathematics

1 answer:

grandymaker [24]3 years ago

5 0

Answer: 6i) 6a² - 2ab

6ii) -2b³

6iii) b³ + 7b² - 49b

Step-by-step explanation:

6i) (a + b)(5a - 3b) + (a - 3b)(a - b)

= 5a² - 3ab + 5ab - 3b² + a² - ab - 3ab + 3b²

= 5a² + 2ab - 3b² + a² - 4ab + 3b²

= 6a² - 2ab

6ii) (a - b)(a² + b² + ab) - (a + b)(a² + b² - ab)

= a³ + ab² + a²b - ab² - a²b - b³ - (a³ + ab² - a²b -ab² + a²b + b³)

= a³ - b³ - (a³ + b³)

= a³ - b³ - a³ - b³

= -2b³

6iii) (b² - 49)(b + 7) + 343

= b³ + 7b² - 49b - 343 + 343

= b³ + 7b² - 49b

You are allowed a maximum of 3 questions.

Please post #7 on a different question.

You might be interested in

Use the balanced scale to find the conversion factor that can be used to convert the number of blocks to the weight of the block

Alexandra [31]

Find Total weight at left side

$\\ \sf\longmapsto 6(1lb)=6lbs$

Now

Per block weight at right side

$\\ \sf\longmapsto \dfrac{6}{4}=1.5lbs$

6 0

3 years ago

F(x) = -3(x - 1)2 + 3 How do you turn it into standard form

Zepler [3.9K]

Answer:

$\displaystyle \boxed{f(x) = 6x - 3x^2}$

Step-by-step explanation:

f(x) = −3(x² - 2x + 1) + 3

f(x) = −3x² + 6x - 3 + 3

f(x) = −3x² + 6x

** The above answer is written in reverse, which is the exact same result.

I am joyous to assist you anytime.

7 0

4 years ago

A hockey puck has a diameter of 3 inches and rolls on its edge for 24 rotations. How far did it roll before falling flat?

scoundrel [369]

Find the circumference of the puck using circumference = pi x diameter

Circumference = 3.14 x 3 = 9.42 inches.

For every rotation the puck would travel 9.42 inches.

Now multiply y by 24 rotations:

9.42 x 24 = 226.08 inches.

Answer: 226.08 inches

4 0

3 years ago

What can you conclude about the classification of silicon?

Orlov [11]

Answer:

That i will be happy to know that i don't now and silicon is a element

Step-by-step explanation:

7 0

3 years ago

Solve for y. py + qy = -4y + 8 y =

Elanso [62]

Answer:

y=8/(p+q+4)

Step-by-step explanation:

py+qy=-4y+8

Collect all terms containing y together

Py+qy+4y=8

Factor out y

y(p+q+4)=8

Divide both sides by (p+q+4)

y(p+q+4)/(p+q+4)=8/(p+q+4)

y=8/(p+q+4)

3 0

3 years ago

Read 2 more answers