Answer: 
Step-by-step explanation:
1. By definition, if 
when 
, then:
2. Keeping this on mind, to find the value of 
when 
, you must apply the following proccedure:
3. Now, you must solve for , as following:
4. Then, the result is:
It is 2x(x-7)+3(x-7) = (2x+3)(x-7)
1000+1000=2000-2000=0 the answer is 0
Answer:
A
Step-by-step explanation:
Given
5x² - 45 ← factor out 5 from each term
= 5(x² - 9)
x² - 9 is a difference of squares and factors in general as
a² - b² = (a + b)(a - b), thus
x² - 9
= x² - 3² = (x + 3)(x - 3)
and
5x² - 45
= 5(x + 3)(x - 3) → A
Answer:
1017.88cm³
Step-by-step explanation:
