DrWhoTardis
DrWhoTardis
02-06-2015
Mathematics
contestada
solve for x: 2xsquared+4x-16=0
Respuesta :
Panoyin
Panoyin
02-06-2015
2x² + 4x - 16 = 0
2(x²) + 2(2x) - 2(8) = 0
2(x² + 2x - 8)
=
0
2 2
x² + 2x - 8 = 0
x =
-(2) ± √((2)² - 4(1)(-8))
2(1)
x =
-2 ± √(4 + 32)
2
x =
-2 ± √(36)
2
x =
-2 ± 6
2
x = -1 ± 3
x = -1 + 3 U x = -1 - 3
x = 2 x = -4
Answer Link
VER TODAS LAS RESPUESTAS ( 89+ )
Otras preguntas
1. What is the respiratory structure of a millipede? A. book lungs B. tracheal tube C. gill slits 2. what is the respiratory structure of a spider? A. gills B.
How can b^2+9b+14 be re-written?1) (b+7) (b-7)2) (b-7) (b-2)3) (b+7) (b-2)4) (b+7) (b+2)
Which of the following oxides can dissolve in water to form a solution that would turn litmus indicator red in color? a. MgO b. K₂O c. CO₂ d. ZnO e. H₂O
how do u divide 16 by 3/5
what type of fractions are the following A) 1/3 A) Improper B) mixed C)wholeB) 5 1/6C) 6/5answer A B C with the three multiple choice answers.
Which of the following categories includes the most distantly related organisms? (A) family (B) species (C) class (D) genus (E) order
how many books did Harriet beecher stowe write?
Which of the following molecules has polar bonds but is a nonpolar molecule? a. H₂ b. H₂O c. NH₃ d. NaCl e. CO₂ Can anyone explain this one?
A mouse population starts with 2,000 mice and grows at a rate of 5% per year. The number of mice after t years can be modeled by the equation, P(t)=2000(1.05)^t
which inequality is equivalent to 7x-2y> 8. A) y> 7/2x+8 b) y>-2/7x+8/7 c) y <7/2x-4 d) y <-2/7x-4/7 (whats a Inequality? )
