gagacherfils gagacherfils

11-03-2020
Mathematics

contestada

B^2-4b-12=0 please help me

Respuesta :

devishri1977 devishri1977

11-03-2020

Answer:

Step-by-step explanation:

b² - 4b - 12 = b² - 6b + 2b - 2*6

=b*(b -6) + 2*(b - 6)

= (b - 6) (b + 2)

b² - 4b - 12 = 0

(b - 6) (b + 2) = 0

b - 6 = 0 or b + 2 = 0

b = 6 or b = -2

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