benito0218
benito0218 benito0218
  • 22-04-2020
  • Mathematics
contestada

What are the roots of y = x - 3x – 10?
-3 and -10
-2 and 5
2 and -5
3 and 10​

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 22-04-2020

Answer:

  -2 and 5

Step-by-step explanation:

If roots of a quadratic are "a" and "b", then (x-a) and (x-b) are factors. Then the quadratic can be written as ...

  y = (x -a)(x -b) = x^2 -(a+b)x +ab

That is, the constant (-10) is the product of the roots, and the x-coefficient (-3) is the opposite of their sum.

In short, you want a solution pair that has a sum of 3. Only one answer qualifies: -2 and 5.

Answer Link

Otras preguntas

how many characteristics are needed to prove something is alive?
please help thank you very much.
Which is bigger 30% or 1/3
How do I attach the diagram of my math problem?
Translate into an algebraic expression: The difference of the product of 5 and y and their sum.
The stage manager of a school play creates a rectangular acting area of 42 square yards. String lights will outline the acting area. To the nearest whole number
17*7! Will mark brainliest
What was the written agreement created by the Pilgrims that established the rules and laws for the colony? A. Fundamental Orders of Connecticut B. Jamestown R
Spanish 8 grade homework help me
Three consecutive integers whose sum is 36