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3 years ago

25x^2-16 how to factor

1 answer:

4 0

Did you learn how to factor the difference of two squares ?

This thing is the difference of two squares.

The first term is the square of 5x .
The second term is the square of 4 .

When it's factored, it's

(sum of the square roots) x (difference of the square roots) .

25 x² - 16 = (5x + 4) times (5x - 4) .

To check it, go ahead and FOIL that out, and you'll get 25x²-16 .

You might be interested in

What is 420/15 simplified to

Ghella [55]

So,

In order to simplify a fraction, we have to factor both the numerator and the denominator.
$\frac{420}{15} --\ \textgreater \ \frac{2*2*3*5*7}{3*5}$

Cross out ones.
$\frac{2*2*7}{1}\ or\ 28$

3 0

3 years ago

Read 2 more answers

The half-life of the radioactive element unobtanium-43 is 10 seconds. If 48 grams of unobtanium-43 are initially present, how ma

natka813 [3]

Answer:

At time, 10 seconds, the mass remaining is 24 grams

At time, 20 seconds, the mass remaining is 12 grams

At time, 30 seconds, the mass remaining is 6 grams

At time, 40 seconds, the mass remaining is 3 grams

At time, 50 seconds, the mass remaining is 1.5 grams

Step-by-step explanation:

Given;

initial mass of the radioactive element = 48 grams

half life, t = 10 seconds

time of decay (s) remaining mass of the radioactive element

0 ------------------------------------------------- 48 grams

10------------------------------------------------- 24 grams

20 ------------------------------------------------- 12 grams

30 -------------------------------------------------- 6 grams

40 --------------------------------------------------- 3 grams

50 ----------------------------------------------------- 1.5 grams

60------------------------------------------------------0.75 grams

Thus;

At time, 10 seconds, the mass remaining is 24 grams

At time, 20 seconds, the mass remaining is 12 grams

At time, 30 seconds, the mass remaining is 6 grams

At time, 40 seconds, the mass remaining is 3 grams

At time, 50 seconds, the mass remaining is 1.5 grams

7 0

3 years ago

Maya has 5/6 cup of ice cream. How many 1/4-cup servings are in 5/6 cup of ice cream?

Alla [95]

Answer:

3 and 1 over 3.

Step-by-step explanation:

We divide 5/6 by 1/4.

5 /6 / 1/4

= 5/6 * 4

= 20/6

= 3 2/6

= 3 1/3.

8 0

3 years ago

Read 2 more answers

Melissa has enough paint to cover an area of 250 square feet.she want to paint two walls.the rectangular wall is 9 feet high and

liraira [26]

Answer:

No she doesn't have enough paint.

Step-by-step explanation:

You have to find the area of both walls then subtract both areas by 250. It would give you a negative number, meaning there is not enough paint.

5 0

3 years ago

Read 2 more answers

Udrey used compensation to mentally solve the subtraction problem 5.35−0.07

Licemer1 [7]

The last step you need to do is 5.25+0.03, because you took away 0.03 more than what the question asked so you need to add the 0.03 back, which gets you the final result of 5.28.

6 0

3 years ago