1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mnenie [13.5K]
3 years ago
15

How do you solve (a-3b)(7a-3b)

Mathematics
1 answer:
Anna [14]3 years ago
3 0

Step-by-step explanation:

Simplifying

(7a + 3b)(7a + -3b) = 0

Multiply (7a + 3b) * (7a + -3b)

(7a * (7a + -3b) + 3b * (7a + -3b)) = 0

((7a * 7a + -3b * 7a) + 3b * (7a + -3b)) = 0

Reorder the terms:

((-21ab + 49a2) + 3b * (7a + -3b)) = 0

((-21ab + 49a2) + 3b * (7a + -3b)) = 0

(-21ab + 49a2 + (7a * 3b + -3b * 3b)) = 0

(-21ab + 49a2 + (21ab + -9b2)) = 0

Reorder the terms:

(-21ab + 21ab + 49a2 + -9b2) = 0

Combine like terms: -21ab + 21ab = 0

(0 + 49a2 + -9b2) = 0

(49a2 + -9b2) = 0

Solving

49a2 + -9b2 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '9b2' to each side of the equation.

49a2 + -9b2 + 9b2 = 0 + 9b2

Combine like terms: -9b2 + 9b2 = 0

49a2 + 0 = 0 + 9b2

49a2 = 0 + 9b2

Remove the zero:

49a2 = 9b2

Divide each side by '49'.

a2 = 0.1836734694b2  

Simplifying

a2 = 0.1836734694b2

take the square root of each side:

a = {-0.428571429b, 0.428571429b}

You might be interested in
In the last couple of months, Jack has seen rabbits in his backyard on
seropon [69]

Answer:

12/36 can be simplifed to 1/3 so he has a 1/3's chance of seeing them or 33%

Step-by-step explanation:

:)

7 0
3 years ago
What is the y-intercept for the following table?
ser-zykov [4K]
The first number for the Y it gives on the chart is the intercept
So 3 is correct
Hope that helped:D
5 0
2 years ago
Read 2 more answers
Whats the formula for volume
Bond [772]

Answer:

Volume for cube: L x W x H

L= Length, W= width, H=height

6 0
3 years ago
Read 2 more answers
Lisa wrote the following statement: "You can only draw one unique isosceles triangle that contains an angle of 65°." Which state
JulijaS [17]
Triangles always equal 180 degrees

4 0
3 years ago
I need a little help on this other question : 8(2w-2)=7(3w+2)
Rama09 [41]

8(2w-2)=7(3w+2)

16w - 16 = 21w + 14

-30 = 5w

-30/5 = w

w = -6

3 0
3 years ago
Other questions:
  • What is the equation of the line ?
    15·1 answer
  • A car travels at a constant speed.
    9·1 answer
  • √36a3b4 Simplify this.
    10·1 answer
  • Round 24.787 to the nearest hundredth.<br> Help me plz
    10·2 answers
  • What is an equation in point-slope form for the line that passes through the points (−3,5) and (2,−3)?
    12·1 answer
  • How do i plug this in?
    6·1 answer
  • Please give an explanation on why the answer is the answer
    6·1 answer
  • What is the total surface area ?
    10·1 answer
  • Factorise p^2 + q^2 +5(p^2 + q^2)​
    7·1 answer
  • Erwin Elementary decided to plant a garden. They set up a rectangle that was
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!