What is the solution of the equation (x - 5)2 + 3(x - 5) + 9 =0? use u substitution and the quadratic formula to solve.
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o *-73in3
o. x=2
x-8

x = 7/2 ± 3/2*(i√3)

Step-by-step explanation:

The equation is

(x - 5)^2 + 3(x - 5) + 9 =0

Let A = (x-5)

The equation becomes now

(A)^2 + 3(A) + 9 =0

We then apply the quadratic formula

A = [-(3) ± √((3)^2-4(1)(9)) ]/ (2(1))

A = -3/2 ± 3/2*(i√3)

Now, we revert the substitution

(x-5) = -3/2 ± 3/2*(i√3)

x = 7/2 ± 3/2*(i√3)

question: use the following table of a school bus during morning pickups to calculate its average speed between 2.8 km and 4.2 km

answer: 42 km/h

explanation: 1.4/0.033 42.42424 = 42 km/h

question answered by

(jacemorris04)

hi there, i would be interested to you with your test, may you add the questions and answer options.

- : )