Use the discriminant, b2−4ac, to determine the number of solutions

krypsojx

krypsojx

Answered question

2021-12-04

Use the discriminant, b24ac, to determine the number of solutions of the following quadratic equation. Then solve the quadratic equation using the quadratic formula.
6x25=2
Select the number and type of solutions. Then, enter the solutions.
a) Two different real solutions
b) One Repeated real solution
c) Two Non-Real solutions.

Answer & Explanation

Louise Eldridge

Louise Eldridge

Beginner2021-12-05Added 17 answers

Step 1
Given equation
6x25x=2
1) 6x2+5x+2=0
Step 2
Using the discriminant
If b24ac>0 then equation has two different real solution
If b24ac<0 then equation has complex solution
If b24ac=0 then equation has one repeated real solution
Step 3
Now equation (1) comparing ax2+bx+c=0
a=6, b=5 and c=2
Discriminant =b24ac
=524(6)(2)
=2548
=23<0
Given equation has complex solution.
Given equation has two non real solution
Option (C) is correct
Therefore,
x=b±b24ac2a
x=5±232(6)
x=5±i2312
x=5+i2312, 5i2312
It is two non real solution

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