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vagabundo [1.1K]
4 years ago
10

How would you factor a quadratic expression like 9x^2-4

Mathematics
1 answer:
Ganezh [65]4 years ago
7 0

Hello, we need to see it as a difference of two squares as we know that for all a and b real numbers

a^2-b^2=(a-b)(a+b)

So, here

9x^2-4=(3x)^2-2^2=(3x-2)(3x+2)

Voila !

Thank you

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I need help it is confusing?????
algol [13]

Answer:

1. 7

2. 15

3. 181

Step-by-step explanation:

Just make sure that you make your denominator a whole number

1. 9.8/1.4....,you multiply by 10...which only removes the comma but it keeps the structure of the question

Always remember that what you do to the denominator...you also do to the numerator

: 9.8/1.4 × 10/10 = 98/14 = 7

2. 40.5/2.7....,you multiply by 10

: 40.5/2.7 × 10/10 = 405/27 = 15

3. 3.62/0.02...., you multiply by 100

: 3.62/0.02 × 100/100 = 362/2 = 181

5 0
3 years ago
PLEASSS HELPPPP
Lera25 [3.4K]

Answer:

-11 + 4

Step-by-step explanation:

When you subtract a negative the sign will  switch to plus, so it this case you would switch the - (-4) to a + 4 but you don't change the -11 at the front.

6 0
3 years ago
Find the measure of the are or angle indicated. Assume that lines which appear tanget are tangents. ​
Brilliant_brown [7]

9514 1404 393

Answer:

  1. 85°
  2. 60°

Step-by-step explanation:

1. Angle JKL is half the measure of the intercepted arc JK.

  (1/2)JK = 1/2(360° -190°) = (1/2)(170°) = 85°

  angle JKL is 85°

__

2. The angle between tangents is the supplement of the intercepted arc.

  angle JKL = 180° -(360° -240°)

  angle JKL = 60°

8 0
3 years ago
What is 3.75 as a mixed number in its simplest form
Fittoniya [83]
3\frac{3}{4}
5 0
4 years ago
(-8+1.5)x4/5 <br><br> Help please
fenix001 [56]

Answer:

-5.2

Step-by-step explanation:

-8+1.5 = -6.5

-6.5 * 4/5 = -6.5 * 0.8 = -5.2

7 0
2 years ago
Read 2 more answers
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