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

The formula for the area of a circle is A=1/2bh . Write an equation that shows the formula in terms for h . <<< can anyone help

How many liters of wine can be held in a wine barrel whose capacity is 30.0 gal? 1 gal = 4 qt = 3.7854 l?

How did renaissance artists differ from medieval artists in their treatment of religious themes?

In the book thief what was significant about the book entitled the whistler?

What is the length of leg y of the right triangle? The sides are 26,24,Y?Answer choices, 10,14,24,26

In which economic system does the government control all economic decisions? A. Socialism B. Communism C. Capitalism

2+2939939393939393939399393993939939399393949949494949488483884849393 i need help pls

What characteristic best describes the areas with the lowest levels of reflected shortwave radiation in both june in the northern hemisphere and december in the

How is the number of house of representatives decided?

If you have a quarter of a pie and you cut it in half, what fraction of a pie would each slice represent? enter the numerator followed by the denominator, separ