SOLUTION: Find the approximate decimal solutions to the following equation: 4X^2-9X-5=0 Answers are either: 0.46107,-2.77107 0.46107, 2.71107 -0.46107, -2.71107 -0.46107, 2.71107

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Find the approximate decimal solutions to the following equation: 4X^2-9X-5=0 Answers are either: 0.46107,-2.77107 0.46107, 2.71107 -0.46107, -2.71107 -0.46107, 2.71107      Log On


   

Question 302412: Find the approximate decimal solutions to the following equation:
4X^2-9X-5=0
Answers are either:
0.46107,-2.77107
0.46107, 2.71107
-0.46107, -2.71107
-0.46107, 2.71107
Answer by london maths tutor(243) About Me  (Show Source):
You can put this solution on YOUR website!
4X%5E2-9X-5=0
Using the formular : x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
where a = 4 , b = -9 and c = -5
x+=+%289+%2B-+sqrt%28+%28-9%29%5E2-4%2A4%2A%28-5%29+%29%29%2F%282%2A4%29+
Answer : x = 2.71107 or -0.46107