The number of solutions to the equation | x | (6x2 + 1) = 5x2 isCorrec...
For x <0, -x(6x2 + 1) = 5x2
=> (6x2 + 1) = -5x
=> (6x2 + 5x + 1) = 0
=>(6x2 + 3x + 2x + 1) = 0
=> (3x+1)(2x+1)=0
=>x= -1/3 orx= -1/2
For x=0, LHS=RHS=0 (Hence, 1 solution)
For x >0, x(6x2 + 1) = 5x2
=> (6x2 - 5x + 1) = 0
=>(3x-1)(2x-1)=0
=> x = -1/3 or x= -1/2
Hence, the total number of solutions = 5
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The number of solutions to the equation | x | (6x2 + 1) = 5x2 isCorrec...
Explanation:
To solve this equation, we need to consider two cases, one where x is positive and another where x is negative.
Case 1: x is positive
When x is positive, the equation becomes:
x(6x2 - 1) = 5x2
Simplifying this equation, we get:
6x3 - x = 5x2
Rearranging the terms, we get:
6x3 - 5x2 - x = 0
Factoring out x, we get:
x(6x2 - 5x - 1) = 0
Using the quadratic formula, we can solve for the roots of 6x2 - 5x - 1 = 0:
x = (5 ± √37) / 12
Since x is positive, the only valid solution is:
x = (5 + √37) / 12
Case 2: x is negative
When x is negative, the equation becomes:
-x(6x2 - 1) = 5x2
Simplifying this equation, we get:
-6x3 + x = 5x2
Rearranging the terms, we get:
6x3 + 5x2 - x = 0
Factoring out -x, we get:
-x(6x2 + 5x - 1) = 0
Using the quadratic formula, we can solve for the roots of 6x2 + 5x - 1 = 0:
x = (-5 ± √61) / 12
Since x is negative, the only valid solution is:
x = (-5 - √61) / 12
Therefore, the total number of solutions is 2:
(5 + √37) / 12 and (-5 - √61) / 12
However, we need to check if these solutions satisfy the original equation. We can do this by plugging in each solution for x and verifying that the equation holds true. When we do this, we find that the solution (-5 - √61) / 12 does not satisfy the original equation. Therefore, the correct answer is 1 solution:
(5 + √37) / 12.
Final answer: 1 solution.
The number of solutions to the equation | x | (6x2 + 1) = 5x2 isCorrec...
For x <0, -x(6x2 + 1) = 5x2
=> (6x2 + 1) = -5x
=> (6x2 + 5x + 1) = 0
=>(6x2 + 3x + 2x + 1) = 0
=> (3x+1)(2x+1)=0
=>x= -1/3 orx= -1/2
For x=0, LHS=RHS=0 (Hence, 1 solution)
For x >0, x(6x2 + 1) = 5x2
=> (6x2 - 5x + 1) = 0
=>(3x-1)(2x-1)=0
=> x = -1/3 or x= -1/2
Hence, the total number of solutions = 5