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

Find the percent of the number. 15% of 20 is .
What arranged for loans to be made to germany so that it could pay war reparations?
Which tribe was known to have adopted many white customs? A Seminoles B Cherokees C Choctaws D Creeks
Concerning life on earth, what property or properties of carbon makes it essential for organic life?
The [FILL IN THE BLANK] shows your health on a sliding scale with different degrees of health and wellness.
help plz if i get this wrong i will fail :(
Johnny invested $1000 in savings account that yields 2% interest annually. How much will Johnny's investment be worth in 10 years?
Who is responsible for the 2000 year death of chemistry?
A behavior that an animal doesn't need to learn is
Jake prefers to consume 6 coconuts when producing/consuming alone, andlarry prefers 4 coconuts when producing/consuming alone. they also enjoy the corresponding