Find the solution(s) of 3(x^2)-6x+2=0

This is a quadratic equation and as such it has zero, one or two solutions depending on the value of the discriminant (b2-4ac). In this equation, a=3, b=-6 and c=2 so b2-4ac = 36-24=12. As this is >0 the equation has two real solutions, however this is not a square number and therefore we cannot factorise and will have to use the quadratic formula. This is (-b (+/-) (b2-4ac)1/2)/(2a). Subsituting in a, b and c gives us (6 (+/-) 121/2)/6 which means our two solutions are x=1+(1/6)121/2and x=1-(1/6)121/2

AS

Related Maths A Level answers

All answers ▸

Differentiate (2^x)(5x^2+5x)^2.


Complete the indefinite integral of 3x^2 + 4x -2/(x^2)


Consider the functions f and g where f (x) = 3x − 5 and g (x) = x − 2 . (a) Find the inverse function, f^−1 . (b) Given that g^−1(x) = x + 2 , find (g^−1 o f )(x) . (c) Given also that (f^−1 o g)(x) = (x + 3)/3 , solve (f^−1 o g)(x) = (g^−1 o f)(x)


Differentiate y=x*ln(x^3-5)