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Daniel [21]
3 years ago
8

Could use a bit of help here. I'm terrible at Math. ​

Mathematics
2 answers:
Eva8 [605]3 years ago
8 0

Answer:

1. 4(x +3)(x - 3)

2. (11 + 2x)(11 - 2x)

3. 9(x + 3)(x - 3)

Step-by-step explanation:

For 36x^2 - 16,

Taking the common factor of 4 out, we get:

4(x^2 - 9)

4(x +3)(x - 3)   (since we know that x^2 - 9 = (x + 3)(x - 3))

For 121 - 4x^2,

Using the formula a^2 - b^2 = (a + b)(a - b), we get:

= (11)^2 - (2x)^2

= (11 + 2x)(11 - 2x)

For 9x^2 - 81,

Taking the common factor of 9 out, we get:

= 9(x^2 - 9)

Now use the formula a^2 - b^2 = (a + b)(a - b):

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

= 9(x + 3)(x - 3)

Hope this helps!

Pavlova-9 [17]3 years ago
7 0

Step-by-step explanation:

<u>Step 1:  Answer problem 1</u>

<em>Pull out 4</em>

4(9x^2 - 4)

<em>Factor</em>

4(3x + 2)(3x - 2)

<u>Step 2:  Answer problem 2</u>

<em>Fact</em>or

(11 + 2x)(11 - 2x)

<u>Step 3:  Answer problem 3</u>

<em>Pull out 9</em>

9(x^2 - 9)

9(x + 3)(x - 3)

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