haleywillaert haleywillaert

01-03-2019
Mathematics

contestada

Factor 2x^2-4x-30 completely. A. 2(x-5)(x+3) B. (2x-5)(x+3) C. (2x+3)(x-5) D. 2(x-3)(x+5)

Respuesta :

01-03-2019

Answer:

2(x - 5)(x + 3)

Step-by-step explanation:

[tex]2x^2-4x-30\\\\=2\cdot x^2-2\cdot2x-2\cdot15\\\\=2(x^2-2x-15)\\\\=2(x^2+3x-5x-15)\\\\=2[x(x+3)-5(x+3)]\\\\=2(x+3)(x-5)[/tex]

Answer Link

Otras preguntas

Question 10(Multiple Choice Worth 1 points) (08.01 LC) Susan wants to conduct a survey to find how much time the students of her school spent eating in a local

Estimate the average rate of change from x = 4 to x = 7.

6.394230769how do I make that number in scientific notation???

Engl112l introduction to literature midterm

evaluate the expression 7.4 - (3.5 - 3.1)

(5y-23) (2x+13) 47 (3x) find the values of c and y

find the coordinates of the mid point of the segments given its end points T(5, -1) and U (1, -5)

Select the area on the map that is the Appalachian mountains. This mountain range acted as a natural border between the territories of England and France. FRANC

A 8 letter Code word is selected. What is the probability that there are no repeated letters?

Write an equation that passes through the given points and is perpendicular to the line , (-3,1); y=-5x+2, write it in slope-intercept form pls.