![j015](/avatars/10364.jpg)
j015
26.09.2019 •
Mathematics
Simplify this expression.
3x2(7x2 - 9)
a.
21x2 - 9
b.
21x2 - 27x2
c.
21x4 - 9
d.
21x4 - 27x2
Solved
Show answers
More tips
- H Health and Medicine How to Help Men Gain Weight?...
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- H Health and Medicine Hangover: How to Get Rid of It Quickly?...
- S Style and Beauty How to Choose the Right Fur Coat and Avoid Regrets?...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
Answers on questions: Mathematics
- M Mathematics Help me please Thank you...
- M Mathematics Am 14 and am dating a 16-year-old girl. Is that ok or weird?...
- M Mathematics I need help..............
- M Mathematics Write an equation to describe the sequence below. Use n to represent the position of a term in the sequence, where n = 1 for the first term. -5, 15, -45, .. Write...
- M Mathematics Find the perimeter and area of a right triangle whose base is 12 inches and hypotenuse is 18 inches...
- M Mathematics -x+y = 5 x - 5y = -9 Solve by elimination Y and x...
- M Mathematics Pleaze help the question is in the picture...
- M Mathematics Pls help with this question...
- M Mathematics 15 more than 3 times a number is 5 less than 2 times a number...
- M Mathematics I need the answer asap...
Ответ:
Option D is correct.
Step-by-step explanation:
In order to simplify the given expression we should know what Distributive property of number is.
It is given by a*x (b-c ) = axb -axc
that is if a is outside of the parenthesis then a is multiplied to all the term inside one by one
here in the question outside is
and inside is
and 9.
therefore
is multiplied to both
and 9
So first term is obtained by multiplying
by
which gives
and second term is obtained by multiplying
by 9 we get
So expression is
- ![27x^2](/tpl/images/0265/0242/87d37.png)
Ответ:
a
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
here m = 7, hence y = 7x + c
To find c substitute ( 8, 6 ) into the equation
6 = 56 + c ⇒ c = 6 - 56 = - 50, thus
y = 7x - 50 → a