kjohnson147 kjohnson147

13-03-2017
Mathematics

contestada

find the solution set x^2-7x-8=0 separate the two values with a comma

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wolf1728 wolf1728

13-03-2017

a=1 b=-7 c=-8
Using the quadratic formula:
x = --7 +-sq root(49 -4*1*-8)/2*1
x = 7 +-sq root(49 +32)/2
x1 = (7 + 9) / 2 = 8
x2 = (7 - 9) / 2 = -1

answers (8,-1)

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