ceannaloves1d ceannaloves1d

02-05-2017
Mathematics

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What are the x-intercepts of the quadratic function? F (x)=x^2-3x-10

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ghanami ghanami

07-05-2017

hello :
hello :
f(x) = x²-3x-10
the x-intercepts solutions f(x) = 0
Δ =b²-4ac a =1 b = -3 c = -10
Δ =(-3)²-4(1)(-10) =49 = 7²
x1 = (3-7)/2 x2 = (3+7)/2
the x-intercepts : 5 , -2

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