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Mice21 [21]
3 years ago
13

(b-3)squared expanded

Mathematics
1 answer:
Galina-37 [17]3 years ago
8 0

Answer:

Step-by-step explanation:

(x - y)² = x² - 2xy + y²

x = b  ; y = 3

(b - 3)² = b² - 2 *b * 3 + 3²

          = b² - 6b + 9

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soldier1979 [14.2K]

USE THE IMAGE BELOW TO HELP YOU!

6 0
4 years ago
PLEASE HELP ANSWER THESE QUESTIONS!
Sliva [168]

Answer:

Step-by-step explanation:

a² - b² = (a+ b)(a - b)

1) (2n-4/2n) ÷ (n^2-4/n)

=\frac{2n-4}{2n}*\frac{n}{n^{2}-4}\\\\=\frac{2n-2*2}{2n}*\frac{n}{n^{2}-2^{2}}\\\\=\frac{2*(n-2)}{2n}*\frac{n}{(n+2)*(n-2)}\\\\=\frac{1}{n+2}

2) [y^2-36/y^2-49] ÷[ y+6/y-7]

=\frac{y^{2}-36}{y^{2}-49}*\frac{y-7}{y+6}\\\\=\frac{y^{2}-6^{2}}{y^{2}-7^{2}}*\frac{y-7}{y+6}\\\\=\frac{(y+6)*(y-6)}{(y+7)*(y-7)}*\frac{y-7}{y+6}\\\\=\frac{y-6}{y+7}\\

3) [m^2-1/ m^2-m] ÷ [m^2-7m-8/3m ]

=\frac{m^{2}-1}{m^{2}-m}*\frac{3m}{m^{2}-7m-8}\\\\=\frac{(m+1)*(m-1)}{m*(m-1)}*\frac{3m}{(m-8)*(m+1)}\\\\=\frac{3}{m-8}

Hint :  m² - 7m - 8

sum = -7

Product  = -8

Factor = (-8), 1

m² - 7m - 8  =m² - 8m + m - 8

                   = m*(m - 8) + (m-8)

                   = (m - 8)(m +1)

7 0
3 years ago
PLEASE HELP ME WITH THIS I NEED TO GET IT DONE WITH
stepan [7]

Answer:

Correct answer:  V = 82.5 in³

Step-by-step explanation:

This is a regular five sided prism.

Given:

The base edge  a = 4 in

The radius of the inscribed circle or the height of an isosceles triangle

Ri = h = 2.75 in

Prism height   H = 3 in

The base consists of five isosceles triangles

The area of one triangle is:

A₁ = a · h / 2

The area of the base is:

B = 5 · A₁ = 5 · a · h / 2

B = 5 · 4 · 2.75 / 2 = 27.5 in²

The volume of the prism is:

V = B · H = 27.5 · 3 = 82.5 in³

V = 82.5 in³

God is with you!!!

5 0
3 years ago
What are my zeros (x^2 - 8x + 1)?
Pavel [41]

Answer:

x= 7.87298334621                          x=.12701665379

Step-by-step explanation:

This is in standard form so we have to factor this into

x^2-8x + 16 + 1 = 16

(x-4)^2 = 15

(x-4) = \sqrt{15\\}

x-4= ± 3.87298334621

x-4 = 3.87298334621                      x-4= -3.87298334621

x= 7.87298334621                          x=.12701665379

7 0
3 years ago
Janice works at the We Are Cells. She earns $650 per week plus a 15% commission on all new cell phone contracts that she sells e
sertanlavr [38]

Answer:

y=650+15x

Step-by-step explanation:

y=mx+b, b is starting amount, m is the multiplier for the x

uwu

7 0
4 years ago
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