Hi all,

I was working a quadratic factor problem, but only managed to solve B and C. Attached is my working.
Can anyone please tell my how to solve the rest (i.e. A and D).

Salahuddin
Maths online

It should by ok now. I changed the photo from horizontal to vertical.

You've still to equate coefficients of $x^{3}$ and $x.$
$x: \quad 5 = 5A.$