x = (-b +/- √(b2 - 4ac)) / 2a
in the above equation (assuming x2 = x2) : a=1, b=-14, c=-4
Therefore x = (-(-14) +/- √((-14)2 - 4(1)(-4))) / 2(1)
= (14 +/- √(196+16))/2
= (14 +/- √(212))/2
= (14 + 2√(53))/2 and (14 - 2√(53))/2
Not a very clean answer. In decimals it's approximately 14.28 or -0.28.
Chat with our AI personalities
x: x2 - 81 = 0
y=±√15
16
4n2-25 = 0 4n2=25 n2=6.25 n=sqrt(6.25) n= +2.5 or -2.5
In order to solve this equation you need to know what -28x-2 equals. If you were to assume it was 0 then x = 0.071 rounded