maths
posted by Jayden Haddy on .
solve the following equation by completing square
x(square) + 5x  84
Pls show steps
x= or x=

x^2 + 5x  84 = 0
x^2 + 5x + (5/2)^2  84  (5/2)^2 = 0
(x + 5/2)^2 = 361/4
x + 5/2 = ±19/2
x = 5/2 ± 19/2
x = 12, 7