takemetoouterspace takemetoouterspace

21-03-2017
Mathematics

contestada

What is the value of z so that-9 and 9 are both solutions of x^2+z=103?

A) -22
B) 3
C) 22
D 184

Respuesta :

21-03-2017

If the sol'ns are -9 and 9, then we can use this to form our eq'n:
(x - 9)(x + 9) = 0
x^2 - 81 = 0
so...
x^2 + z - 103 = x^2 -81
z - 103 = -81
z = -81 + 103
z = 22

Answer Link

Otras preguntas

What nation invaded Afghanistan in 1979 and was still occupying it in 1980? A. Iraq B. China C. Soviet Union D. Pakistan

why did france and great britain agree with hitler's demands

Discussion on one of our friend has become a victim of cyber crime and is too scared to tell somebody

What were two diseases Europeans brought to the nether world that killed natives

If grapes are $1.60 per 1/2 pound, how many pounds can you buy for $64.00?

What is the most likely significance of the tagline The Greatest Snow on Earth It is a play on the words The Greatest Show on Earth, suggesting that the snowfal

Which of the following battles is considered to be a turning point in the Pacifi c Campaign during World War II? (A) Battle of Guadalcanal (B) Battle of Iwo Jim

How did many twentieth-century artists respond to the extravagant furniture designs popular in the sixteenth-nineteenth centuries? a. By designing country-inspi

who was francisco pizarro, and what did he do?

Who led most of the Italian Renaissance city-states? a. doges b. artists and architects c. monarchs d. powerful merchant families