Step-by-step explanation:
Answer:
In step 2, the subtraction property of equality was applied
In step 4, the division property of equality was applied
Step-by-step explanation:
The complete factorization of the equation 81x² - 100 is; (9x - 10)(9x + 10)
<h3>How to factorize quadratic equations?</h3>
We are given the quadratic equation;
81x² - 100
Now, according to quadratic identities, we know that;
(a + b) * (a - b) = a² - b²
Now, our equation can also be expressed as;
81x² - 100 = 9²x² - 10²
Thus, applying the quadratic identity gives us;
(9x + 10)(9x - 10)
Read more about factorization of quadratic equations at; brainly.com/question/1214333
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Answer:
There are no choices
Step-by-step explanation:
;-;
Let's just do a bunch of math below.
7.8 X 103 ?
-------------- = ------
1.2 X 104 ?
So, first, we're gonna do 7.8 multiplied by 103 to get 803.4.
Thus....
7.8 X 103 803.4
-------------- = -----------
1.2 X 104 ?
Then we would do 1.2 multipied with 104 to get a product of 124.8.
Therefore....
7.8 X 103 803.4
-------------- = -----------
1.2 X 104 124.8
Dividing 803.4 by 124.8 would get you a quotient of 6.4375.
Your answer is 6.3475.~
Have a nice day~
