I'm really struggling with this following 3-part problem. Any help or guidance through them would be greatly appreciated.

**1a.**Using u-substitution, solve (

*x*^2 - 2)^2 - 3(

*x*^2 - 2) - 4 = 0.

So I was able to figure this problem out using u-substitution and got

__x = (±) square root of 6 & x = ±1.__

**1b.**The quadratic formula solves equations of the form

*ax*^2 +

*bx*+

*c*= 0. Find the formula that solves

*a*(

*x*^2 -

*d*)^2 +

*b*(

*x*^2 -

*d*) +

*c*= 0

For this problem, their looking for a formula but I'm not sure which one or how to find it.

**1c.**Use your formula from part (

**b**) to verify your answers from part (

**a**).

For this last part, part 1b must be completed.