SOLUTION: Solve using the quadratic formula: x2 – 3x – 3 = 5

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Question 44679This question is from textbook INTERMEDIATE ALGEBRA
: Solve using the quadratic formula:
x2 – 3x – 3 = 5
 This question is from textbook INTERMEDIATE ALGEBRA

Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
x2 – 3x – 3 -5= 5-5 [Set the equation equal to zero]
x^2 – 3x – 8 = 0
.
.
Plug the values of the coefficients into the quadratic formula:
a=+1
b=-3
c=-8
.
x+=+%28--3+%2B-+sqrt%28+-3%5E2-4%2A1%2A-8+%29%29%2F%282%2A1%29+
.
Simplify:
x+=+%283+%2B-+sqrt%28+9+%2B+32+%29%29%2F%282%29+
.
Continue to simplify:
x+=+%283+%2B-+sqrt%28+41+%29%29%2F%282%29+
.
.
x = 4.7015 or x = -1.7015
.