zabid20tiger zabid20tiger

01-06-2018
Mathematics

contestada

Factor completely
9-6a-24a^2

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mkryukova19 mkryukova19

01-06-2018

-24a²- 6a +9 = - 3(8a² +6a - 9)

8a² +6a - 9 =0

x=(-b +/-√(b² - 4ac))/2a
x = (-6 +/-√(36+4*8*9) /(2*8) = (-6 +/-√(324)  /16 =  (-6 +/-18)/16
x1 =  (-6 +18)/16 = 0.75
x2 =  (-6 -18)/16 = - 1.5

-24a²- 6a +9 = - 3(8a² +6a - 9) = -3(a - 0.75)(a + 1.5)

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kws65411 kws65411

11-09-2020

-3 (2a - 1) (4a + 3)

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