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3 years ago

(3x+7)(3x-7) if necessary combine like terms

Mathematics

1 answer:

34kurt3 years ago

3 0

Answer:

9x^2 -49

Step-by-step explanation:

We recognize that this is of the form

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

3x = a and 7 =b

(3x)^2 - 7^2

9x^2 -49

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2/3 + (-5/7)<br><br><br><br> .........

dmitriy555 [2]

Answer:

-1/21

Step-by-step explanation:

2/3 + -5/7

Get a common denominator of 21

2/3 *7/7 = 14/21

-5/7*3/3 = -15/21

14/21 - 15/21 = -1/21

4 0

3 years ago

Read 2 more answers

What is the factored form of this expression 4x^2 -12x+9

Anon25 [30]

Answer:

(2x - 3) ^2

Step-by-step explanation:

Factor using the perfect square rule.

7 0

3 years ago

Describe the process of rewriting the expression Please Help

Mazyrski [523]

Answer:

$x^{\frac{21}{4} }$

Step-by-step explanation:

Given expression is:

$(\sqrt[8]{x^7} )^{6}$

First we will use the rule:

$\sqrt[n]{x} = x^{\frac{1}{n} }$

So for the given expression:

$\sqrt[8]{x^{7}}=(x^{7} )^{\frac{1}{8} }$

We will use tha property of multiplication on powers:

$=x^{7*\frac{1}{8} }$

$= x^{\frac{7}{8} }$

Applying the outer exponent now

$(x^{\frac{7}{8} })^6$

$= x^{\frac{7}{8}*6 } \\= x^{\frac{42}{8} }\\= x^{\frac{21}{4} }$

8 0

2 years ago

What is the area of the parallelogram shown below?

laiz [17]

Answer:

135 units²

Step-by-step explanation:

height = √17²-8²=√289-64=√225=15

area = 9×15 = 135 units²

6 0

2 years ago

Read 2 more answers

What is an equivalent way to write the expression without grouping symbols? 7(4−x) Drag and drop the values into the boxes to cr

wlad13 [49]

Answer:

28-7x

Step-by-step explanation:

To write the expression without grouping symbols, multiply the 7 into both terms using the distributive property.

7*4 - 7^x

28-7x

8 0

3 years ago