ToddFunk
ToddFunk ToddFunk
  • 26-04-2018
  • Mathematics
contestada

Which of the following are solutions to 2x^2 - 8x - 90? Select all that apply. A) 2, B)-5, C)-7, D)9, E)15, F)5, G)7

Respuesta :

choixongdong
choixongdong choixongdong
  • 26-04-2018
2x^2 - 8x - 90
= 2 (x^2 - 4x - 45)
= 2 (x - 9)(x + 5)

so
x - 9 = 0; x = 9
x + 5 = 0; x = -5

solutions -5 and 9

answer
B)-5
D)9
Answer Link

Otras preguntas

To a scientist, being objective means ________________ A entering into every situation with a planned objective. B studying objects. C relying on observat
How to I answer this (picture)? pls don't just give the answer!!
The temperature was -3*C on Friday and dropped overnight by 9*C. What was the temperature on Saturday morning
Rodrigo buys a jacket that is on sale 1/4 off the original price of $80. he has a coupon for an additional 10% off. how much does rodrigo pay for the jacket? A.
PLZZZZZ NEED HELP!!!!!!
El muchacho sabe (knows) el secreto _____ muchachas.
Why was the Zimmerman Telegram a contributing factor to the U.S. declaration of war? A) It revealed that Mexico was going to enter the war with the Central Powe
Hi sydney I need help
2-methylbenzamide and 3-nitrobenzoic acid both have a melting point of
Why was the ruling in McCulloch v. Maryland significant?