x2-6x-3=0, solve using quadratic equation formula method
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x²-6x-3=0
compare equation with ax²+bx+c=0
a=1,b=-6,c=-3
b²-4ac=(-6)²-4×1×(-3)
= 36+12
=48
by using Formula,
x=-b+or-√b²-4ac
2a
x=-(-6)+or-√48
2×1
x=6+or-√48
2
x=6+or-√16×3
2
x=6+or-4√3
2
x=2(3+or-2√3)
2
x=(3+or-2√3)
x=3+2√3 or x=3-2√3
x=3+2√3 or x=3-2√3 are roots of quadratic equation.
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