Use the quadratic formula to solve 4y2 + 8y + 7 = 4.
4y^2 + 8y + 7 = 4 4y^2 + 8y + 7 - 4 = 0 4y^2 + 8y + 3 = 0 a = 4, b = 8, c = 3 b^2 - 4ac = 8^2 - 4(4)(3) = 64 - 48 = 16 x = (-8 ± sqrt 16)/8 = (-8 ± 4)/8 x = -1/2 or x = -3/2
Question
Asked 6/7/2013 5:06:12 PM
Updated 6/6/2014 12:03:08 AM
Edited by andrewpallarca [6/6/2014 10:44:44 AM]
Rating
3
4y^2 + 8y + 7 = 4
4y^2 + 8y + 7 - 4 = 0
4y^2 + 8y + 3 = 0
a = 4, b = 8, c = 3
b^2 - 4ac = 8^2 - 4(4)(3) = 64 - 48 = 16
x = (-8 ± sqrt 16)/8
= (-8 ± 4)/8
x = -1/2 or x = -3/2
Added 6/6/2014 12:03:08 AM
This answer has been confirmed as correct and helpful.
Confirmed by andrewpallarca [6/6/2014 10:44:45 AM]

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