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
nignag [31]
3 years ago
7

Which of the following is a perfect square trinomial?

Mathematics
1 answer:
alexira [117]3 years ago
3 0
Whenever you factor a trinomial ax²+bx+c, you find two numbers that add up to b and multiply to get ac, and split bx into those values. Then factor.
With a perfect square trinomial, these values will always be the same and thus you can check by splitting it in half.

25x² + 15xy + 15xy - 9y²
5x(5x+3y) + 3y(5x-3y)
(5x+3y)(5x-3y)
even though this is factorable by splitting 15 and 15, it is not a PST

25x² - 15xy - 15xy + 9y²
5x(5x-3y) -3y(5x-3y)
(5x-3y)(5x-3y)
(5x-3y)²
PST!

25x² - 8xy - 8xy + 9y²
x(25x-8y)-y(8x-9y)
not a perfect square trinomial

25x² + 8xy + 8xy + 9y²
x(25x+y)+y(8x+y)
not a perfect square trinomial

Ans: B. 25x² - 30xy + 9y²
You might be interested in
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Natasha_Volkova [10]

Answer:   1. 447

                2. 572

                3. 257

               

Step-by-step explanation:

3 0
3 years ago
A polygon is shown what is the measure of U
Elan Coil [88]

Answer:

120

Step-by-step explanation:

That's a guess, but it's the most logical one.

6 0
3 years ago
Please solve...Thanks
liberstina [14]
Micheal has 40ft of fencing for the rectangular dog run. So the perimeter of the dog run is 40ft.

Perimeter=40ft

The perimeter of a rectangle is:

P=2l+2w

Since we know the length is 5 and the perimeter is 40, we can solve for the width.

P=2l+2w
40=2*(5)+2w
40=10+2w
subtract 10 from both sides
30=2w
divide both sides by 2
15=w

The width of the fence is 15feet.

3 0
3 years ago
URGENT I NEED HELPPPPP
lorasvet [3.4K]

Answer:

8/15

Step-by-step explanation:

Using Pythagorean Theorem the length of XZ is 15.

tan X = opposite / adjacent = YZ / XZ = 8 / 15.

7 0
4 years ago
Read 2 more answers
Hannah buys 3 pairs of shoes for $x each. She uses a $10 off coupon. She
iogann1982 [59]

Answer:

$15 per pair

Step-by-step explanation:

We know that the total amount of money she spent on the shoes (without discount) is 3x. Since she used a $10 off coupon, the money she spent is 3x - 10, since $10 off means - 10. And this amount equals $35:

3x - 10 = 35\\3x = 45\\x = 45/3 \\x = 15

Please mark Brainliest

⚡✨

3 0
3 years ago
Read 2 more answers
Other questions:
  • An automatic machine is set to fill bags of dog food with exactly 25 pounds on average with a standard deviation of 0.5 pounds.
    12·1 answer
  • Betty has 741 coins in her piggy bank, worth a total of 10,725 cents. The piggy bank only contains quarters and dimes. How many
    7·1 answer
  • Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17 %, and Rb-87 with ma
    7·1 answer
  • What is the result if you divide –12x8y8 by 3x4y2?
    5·2 answers
  • Nine new employees, two of whom are married to each other, are to be assigned nine desks that are lined up in a row. If the assi
    9·1 answer
  • If the sales tax for the city of Los Angeles is 9.75%, how much tax would you pay for an item that costs $200.00?
    5·2 answers
  • Combined 5 Z + 3 - 3 Z ​
    12·2 answers
  • Help on math please.
    9·1 answer
  • Indentify the y-intercept of the graph below
    5·1 answer
  • Order the steps for simplifying an expression with three operations
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!