Question 259972
My book says the answer is -5 and -3, where am I missing it?
{{{x^2-8x-15=0}}}, assume the equation should be x^2 - 8x + 15
x={{{(-(-8)+- sqrt(-8^2-4*1*15))/(2*1)}}}
x={{{8+- sqrt (64-60)/(2)}}}
x={{{8+- sqrt (4)/(2)}}}
:
Th book is wrong, this would factor to:
(x-5)(x-3) = 0
which is:
x=5,x=3