What is the solution of the equation (x – 5)2 + 3(x – 5) + 9 = 0? use u substitution and the quadratic formula to solve.

Explanation:

Since, given quadratic function, -----(1)

let us consider,-----(2)

Put this value in equation (1),

We get, , which is also a quadratic equation.

Since, quadratic formula for finding the root of quadratic equation of type is,  

Here, a=1, b=3  and c=9, so,

Thus,   ⇒   (because √-1=i)

Now, from equation(2)

⇒

⇒

ok

step-by-step explanation:

both equations and proportions are better.