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3 years ago

7

25x^2-16 how to factor

1 answer:

kotykmax [81]3 years ago

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

Solve the inequality x divided by 6 is less than or equal to 3

Alja [10]

Your inequality looks like this:
$\frac{x}{6} \leq 3$
To get rid of the /6, you need to multiply by 6 as the opposite operation cancels it out. So, all you need to do is multiply both sides by 6 to isolate x.
Therefore:
$x \leq 18$

6 0

3 years ago

Pls help I need help

Alex73 [517]

Answer:

∴ 2nd equation can be used to determine the length of other leg.

Which is known as $a=\sqrt{13^{2}-12^{2}}$

Step-by-step explanation:

Given,

A Right Triangle has hypotenuse of $13$ units and one leg has $12$ units.

We know Pythagoras Formula for Right Triangle;

$Hypotenuse^{2} =Perpendicular^{2} +Base^{2}$

Here hypotenuse and one leg values in above equation and take $Base=a$ ;

$13^{2} =12^{2} +a^{2}$

$a^{2} =13^{2} -12^{2}$

$a=\sqrt{13^{2}-12^{2}}$

So 2nd equation can be used to determine the length of other leg.

6 0

3 years ago

Please help me I really really need help

postnew [5]

Answer:

$B) \sqrt{2}$ ÷ $2\sqrt{5}$

Step-by-step explanation:

$A$ → $2\sqrt{5}$ ÷ $\sqrt{5}$

$= \frac{2\sqrt{5} }{\sqrt{5} }$

<u>→ </u><u>2</u><u> is a rational number</u>

$B)$ → $\sqrt{2}$ ÷ $2\sqrt{5}$

$=\frac{\sqrt{2} }{2\sqrt{5} }$

$=\frac{\sqrt{2} }{\sqrt{2}*\sqrt{2}*\sqrt{5} }$

$= \frac{1}{\sqrt{10} }$

<u>↑ is irrational number</u>

$C)$ $\frac{\pi }{2}$ ÷ $\pi$

$= \frac{\pi }{2} *\frac{1}{\pi }$

$=\frac{1}{2}$

<u>↑ is a rational number</u>

$D)$ $5\pi$ ÷ $\pi$

$= 5$

<u>↑ is a rational number</u>

<u>So,</u><u> Option B</u><u> is your answer</u>

$-----------------$

hope it helps..

have a great day!!!

5 0

3 years ago

All you need is in the photo <br>please answer step by step and fast

Kamila [148]

Answer:

The correct answer is B.

4 0

3 years ago

1. Suppose a pepperoni pizza should bake 7 minutes longer than a plain pizza. a. If a small plain pizza should bake for 12 minut

Black_prince [1.1K]

Answer:

19 min for the small pizza

Step-by-step explanation:

just add 12+7 also no idea what the other one is sorry!

5 0

3 years ago