SOLUTION: How to use the Quadratic Formula to solve x^2 - 8x = 20.
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Question 541193
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How to use the Quadratic Formula to solve x^2 - 8x = 20.
Answer by
mananth(16946)
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x^2-8x=20
x^-8x-20=0
Find the roots of the equation by quadratic formula
a= 1 ,b= -8 ,c= -20
b^2-4ac=
b^2-4ac= 64 - 80
b^2-4ac= 144
= 12
x1=( 8 + 12 )/ 2
x1= 10
x2=( 8 -12 ) / 2
x2= -2