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

Which choice below best restates this long sentence from “The Fall of the House of Usher”? Feeble beams of encrimsoned light made their way through the trellis

35. Which of the following macromolecules are correctly matched with their subcomponents? A. Protein—monosaccharides; Carbohydrates—amino acids; Nucleic acids

Anybody know this answer ?

If you stand next to a wall on a frictionless skateboard and push the wall with a force of 40n, how hard does the wall push on you? if your mass is 80 kg, show

How would your life and the lives of your friends, family, and neighbors be different if suddenly a law such as the nuremberg laws imposed on your culture?

Please help! (Number 16)

If a student wears a ribbon to support or to protest a war, which type of expression is this person exercising?

Solve for k. k^2+6k+9=0

What was king george referred to as in common sense?

Act is a tangent to the circle with at B the measure of abc