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

Identify the punctuation that should be added to the sentence. We once had a pet a cat, but now we don't have any pets. A. a colon B. a dash C. a semicolon

The first four terms of a sequence are shown. 16, 48, 144, 432, ... What is the explicit function, f(n), that defines the sequence? Explain how you determined y

describe the polymerase chain reaction using an analogy

how many moles are in 75.02 grams of strontium

Triangle DEF (not shown) is similar to ABC shown, with angle B congruent to angle E and angle C congruent to angle F. The length of side DE is 6 cm. If the area

A hole the size of a photograph is cut from a red piece of paper to use in a picture frame. On a coordinate plane, 2 squares are shown. The photograph has poi

In the lab, Teresa has two solutions that contain alcohol and is mixing them with each other. She uses 4 times as much Solution A as Solution B. Solution A is

what is 776.732 in word form ?

5x - y = 34x - 2y = 3I need to use substitution for this one. Help?

I NEED HELP ASAP.. WILL GIVE BRAINLIEST. 50 POINTS!