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
Oduvanchick [21]
3 years ago
11

What is the product mentally of (ab + 3)(ab - 3)

Mathematics
2 answers:
AleksAgata [21]3 years ago
3 0

Answer:

ab² - 9

Step-by-step explanation:

Given in the question an expression

(ab + 3)(ab - 3)

To product mentally we will use polynomial identity called

Difference of squares

<h3>a² - b² = (a+b)(a-b) </h3>

here a = ab

        b = 3

(ab + 3)(ab - 3) = ab² - 3² = ab² - 9

xxTIMURxx [149]3 years ago
3 0

<u>Answer:</u>

a^2b^2 - 9

<u>Step-by-step explanation:</u>

We are given the following expression and we are to determine its product mentally:

( a b + 3 ) ( a b - 3 )

For this, we can use the FOIL method, which stands for First, Outer, Inner, Last.

First means multiply the terms which come first in each of the binomial, Outer means multiply the outermost terms in the product. Inner means multiply the innermost two terms. Last means multiply the terms which occur last in each binomial.

So we get:

ab*ab +3*(-3)=a^2b^2 - 9

You might be interested in
Area of octagon with radius 5?
Montano1993 [528]
I got 200 from a octagon with the diameter of 10
3 0
3 years ago
PLSSS HELP AND EXPLAIN :)
vodka [1.7K]

Answer:

968

Step-by-step explanation:

Rectangular Prism: 11*11*5 = 605

Square Pyramid: 11*11 * 9 over 3 = 363

363+605= 968

3 0
3 years ago
Lit. Bhfgggggggggggghggggggg
Archy [21]

Answer:

Image isn't popping up

Step-by-step explanation:

8 0
3 years ago
The distance between the point (2,1,1) and the plane x-2y=5 is​
Eduardwww [97]

The given plane has normal vector

x-2y=5\implies\mathbf n=\langle1,-2,0\rangle

Scaling <em>n</em> by a real number <em>t</em> gives a set of vectors that span an entire line through the origin. Translating this line by adding the vector <2, 1, 1> makes it so that this line passes through the point (2, 1, 1). So this line has equation

\mathbf r(t)=\langle1,-2,0\rangle t+\langle2,1,1\rangle=\langle 2+t, 1-2t, 1\rangle

This line passes through (2, 1, 1) when <em>t</em> = 0, and the line intersects with the plane when

x-2y=5\implies(2+t)-2(1-2t)=5\implies5t=5\implies t=1

which corresponds the point (3, -1, 1) (simply plug <em>t</em> = 1 into the coordinates of \mathbf r(t)).

So the distance between the plane and the point is the distance between the points (2, 1, 1) and (3, -1, 1):

\sqrt{(2-3)^2+(1-(-1))^2+(1-1)^2}=\boxed{\sqrt5}

7 0
3 years ago
There are 18 cupcakes how many 3/4 size servings can u make
ehidna [41]
You can makeabout 17
5 0
3 years ago
Read 2 more answers
Other questions:
  • In order for the function to be linear, what must a be and why?​
    13·1 answer
  • I need this quick please answer fast​
    10·2 answers
  • Which is a factor of each term of the polynomial? <br><br> (3d2 – 10d)
    7·1 answer
  • Write the oppisite of the integer. a bank deposit of 125
    13·1 answer
  • Answer this please! c: i will give brainliest
    14·1 answer
  • Double the difference between 7 and y
    12·2 answers
  • Given the vectors in component form:
    10·2 answers
  • The temperature in noon was 6 degrees. It dropped 1.2 degrees each hour for the next 12 hours. What was the temperature at midni
    8·1 answer
  • Answer the photo below thanks
    13·1 answer
  • Carlos had 7¾ cups of cheese. After making 5 pizzas, he now only has 2 cups of cheese. How much cheese did Carlos use?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!