Answer:
102.4
Step-by-step explanation:
Open the bracket
19-6.2=12.8
8(12.8)
8*12.8=102.4
4q=
4 times q
q being the variable
hope this helps
Move everything to one side and factorize by grouping.
x⁴ - 4 = x³ + 2x
x⁴ - x³ - 2x - 4 = 0
(x⁴ - 4) - (x³ + 2x) = 0
(x² - 2) (x² + 2) - x (x² + 2) = 0
(x² - x - 2) (x² + 2) = 0
(x - 2) (x + 1) (x² + 2) = 0
Then
x - 2 = 0 or x + 1 = 0 or x² + 2 = 0
x = 2 or x = -1 or x² = -2
If x is real, then the third case has no solution. Then x = 2 or x = -1. Otherwise, we can solve over the complexes and include x = ± √2 i where i = √(-1).
Answer:
C
Step-by-step explanation:
Inequalities of the type | x | > a, always have solutions of the form
x < - a or x > a, that is
Given
| 2x + 10 | > 26, then
2x + 10 < - 26 OR 2x + 10 > 26 ( subtract 10 from both sides of both )
2x < - 36 OR 2x > 16 ( divide both sides by 2 of both )
x < - 18 OR x > 8 → C
