Answer: x = ¹/₂ ± √⁸¹
------------
2
Step-by-step explanation:
First write out the equation
x² - x - 20
Now we now write the equation by equating to 0
x² - x - 20 = 0
We now move 20 to the other side of the equation. So
x² - x = 20,
We now add to both side of the equation square of the half the coefficient of the (x) and not (x²) which is (1) . So, the equation now becomes
x² - x + ( ¹/₂ )² = 20 + ( ¹/₂ )²
x² - ( ¹/₂ )² = 20 + ¹/₄
( x - ¹/₂ )² = 20 + ¹/₄, we now resolve the right hand side expression into fraction
( x - ¹/₂ )² = ⁸¹/₄ when the LCM is made 4
Taking the square root of both side to remove the square,we now have
x - ¹/₂ = √⁸¹/₄
x - ¹/₂ = √⁸¹/₂
Therefore,
x = ¹/₂ ± √⁸¹
-----------
2
Answer:
a=7.8
<C=84.8°
<B=44.19
Step-by-step explanation:
Answer:
7
General Formulas and Concepts:
- Degree of Polynomial is determined by the highest power
Step-by-step explanation:
<u>Step 1: Define function</u>
P(x) = 7x⁷ + 2x⁵ + 7x + 7
<u>Step 2: Identify</u>
7x⁷ is the largest term.
- Has the highest power
- Therefore, highest degree
Answer:
A. because 3.7 ×2 is 7.4. so the full answer would be 7.4 ×10^4
Answer:
64%
Step-by-step explanation:
divide 80 by 125 and get .64
