2x^2+5x+1
can this be factorised?
Suppose it can be factorised then we would have:Originally Posted by x-disturbed-x
$\displaystyle 2x^2+5x+1=2(x-a)(x-b)$,
for some $\displaystyle a$ and $\displaystyle b$. But when $\displaystyle x=a$, or $\displaystyle x=b$
the RHS of the last equation is zero.
Therefore $\displaystyle b$ and $\displaystyle c$ are the roots of the quadratic
on the LHS.
The quadratic formula will give the roots of $\displaystyle 2x^2+5x+1$,
which will then allow you to factorise this quadratic.
RonL
Actually it's pretty simple simply plug in the values of
A=2
B=5
C=1
into the quadratic equation