Jenniferp Jenniferp

01-05-2017
Mathematics

contestada

which of the following are solutions to 2x^2 -8x -90
A) 2
B) -5
C) -7
D) 9
E) 15
F) 5
G) 7

Respuesta :

altavistard altavistard

08-07-2018

Please equate 2x^2 -8x -90 to zero: 2x^2 -8x -90=0

Next, reduce 2x^2 -8x -90=0 by div. all terms by 2: x^2 -4x -45=0

Next, factor the poly: (x-9)(x+5) = 0

Set each factor = to 0 and solve for x:

x-9=0 => x=9
x+5=0 => x= -5

Answer Link

Otras preguntas

How are modern Pueblo peoples connected to the Anasazi?

what lead to a huge number of barbadians moving to carolina

Vascular plants, like fern, show alternation of generations. Which represents a gametophyte in the life cycle of fern? a. Rhizomes b. Prothallus c. Sporangia

Is there a lake in South Carolina that is not man made? What is it

3. In a felony case, the purpose of a grand jury is to A. judge on a civil indictment. B. decide if the evidence warrants prosecution. C. decide if th

3. In a felony case, the purpose of a grand jury is to A. judge on a civil indictment. B. decide if the evidence warrants prosecution. C. decide if the off

Which of the following statements is not true of the Muslims? The Muslims controlled southern Spain. The Muslims conquered North Africa. The Muslims controlled

Which sentence in the US Constitution provides for limiting the power of government?

what is sin^2x/1+cosx

One result of Susan B. Anthony’s trial was a focus on the right of every citizen (man and woman) to a fair trial by jury. Which was another result of that trial