What are the zeros of the quadratic function f(x)=8^2-16-15

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Verri asked Sep 8, 2023

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24 votes

What are the zeros of the quadratic function f(x)=8^2-16-15

Mathematics
college

Verri asked Sep 8, 2023

by Verri

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1 Answer

13 votes

Answer:

Explanation:

f(x)=
8x^(2) -16x-15

8x^(2) -16x-15=0

$x=\frac{-b+-\sqrt{b^(2)-4ac } }{2a}$ , a=8, b= - 16, c= - 15

x=(-(-16)+-√((-16)^2-4*8*(-15)) )/(2*8) = (16+-√(736) )/(16) =(16+-4√(46) )/(16) = 1 +- (√(46) )/(4) = 1+- (√(23) √(2))/(2√(2) √(2) ) =1+-(√(23) )/(2√(2) ) = 1+-(√(23) )/(√(8) )