Solve this eq by completing the square
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5x2-30x-10=0
divide whole by 5
x^2-6x-2=0
x^2-6x=2
add (3)^2 to both sides
x^2-6x+3=2+(3)^2
(x-3)^2=11
x-3=√11
x=√11+3
and even x=3-√11
divide whole by 5
x^2-6x-2=0
x^2-6x=2
add (3)^2 to both sides
x^2-6x+3=2+(3)^2
(x-3)^2=11
x-3=√11
x=√11+3
and even x=3-√11
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