pruetttanner
pruetttanner pruetttanner
  • 10-06-2017
  • Mathematics
contestada

the product of some negative number and 4 less than twice that number is 286 find the number

Respuesta :

jdoe0001 jdoe0001
  • 10-06-2017
let's say that number is hmmm "a"

now.. twice "a" is 2*a or 2a
4 less than that is " 2a - 4"

now, the product of those two fellows is 286, well ok

a( 2a - 4) = 286

thus    

[tex]\bf a(2a-4)=286\implies 2a^2-4a^2=286\implies a^2-2a^2=143 \\\\\\ a^2-2a^2-143=0\implies (a-13)(a+11)=0 \\\\\\ \begin{cases} a-13=0\implies &a=13\\ a+11=0\implies &\boxed{a=-11} \end{cases}[/tex]
Answer Link

Otras preguntas

Which statement about enzymes is true? O An enzyme functions to decrease the rate of a chemical reaction. Enzymes are proteins that function as catalysts in non
How many solutions does the system contain?
will give brainliest if done properly
Which thesis statement is specific and focused? One of my favorite activities is hiking in natural environments. Many people enjoy hiking. Because many American
What is the value of k in the product of powers below? 10^3 x 10 x 10^k = 10^-3= 1/10^-3 -3 -1 0 1
Which expression is equivalent to 1/2 (2 - 5x + 6)? 0 -5/4x+2 O -5 +6 1/2 O - 5/4x+1 O-5x+8
Arrange the elements in order of increasing electronegativity. Use the periodic table to help you arrange the elements. P O K Mg < < < <
What is the slope of the line?
WILL MARK BRAINLIEST PLS HELPPPPPP
Read the excerpt from "Daughter of Invention". "Maybe not. Maybe, just maybe, there's something they've missed that's important. With patience and calm, even a