04-05-2017
Mathematics

contestada

Quadratic formula to solve

Quadratic formula to solve class=

Respuesta :

ghanami ghanami

04-05-2017

hello :
7c²+8c+1 = 0
the discriminant Δ = b²-4ac a = 7 b= 8 c = 1
Δ = 8²-4(7)(1) = 64-28 = 36 = 6²
x1 = (-8-6)/14 x2 = (-8+6)/14
x1 =-1 x2 = -1/7

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