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Lera25 [3.4K]
3 years ago
7

25x^2-16 how to factor

Mathematics
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 .

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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
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