# maths

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solve the following equation by completing square

x(square) + 5x - 84
Pls show steps
x= or x=

• maths -

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

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