http://assets.openstudy.com/updates/attachments/4e2dcf950b8b3d38d3bad209-messifan55-1311626806761-messi4.gif
is it y + 2 1 ----- = ------ y y - 5 ???
yes thats how it is
y + 2 1 ----- = ------ y y - 5 cross multiply to get (y - 5)(y + 2) = 1*y y² - 5y + 2y - 10 = y y² - 3y - y - 10 = 0 y² - 4y - 10 = 0 so u get a quadratic equation... do u know how to solve this n get value of x ?????
no i dont
ok, i'll show u...
thanks
- b ± sqroot(b² - 4ac) y = ---------------------- 2a where a = coefficient of y² = 1 b = coefficient of y = -4 c = constant terms = - 10
soo the answer is?
so - (-4) ± sqroot[(-4)² - 4(1)(-10) 4 ± sqroot[16 + 40] 4 ± sqroot[56] y = ----------------------------- = -------------------- = ----------------- 2(1) 2 2 4 ± 2sqroot[14] 2 { 2 ± sqroot[14]} y = --------------- = ------------------ 2 2 y = 2 + sqroot[14] or 2 - sqroot[14]
o.o
if it is clear, pls click GOOD ANSWER button for me ☺☻☺
is the answer 14? lol
i gave you a medal but i dont have my answer -.-
sorry I had to go to sleep and logged out before your post reached me.... Since it is a quadratic equation, you get two values of y y = 2 + sqroot[14] or y = 2 - sqroot[14]
Join our real-time social learning platform and learn together with your friends!