Solve the Quadratic Equation: Finding Roots in 5x² - 6x + 1

Question

Solve the following equation:

5x26x+1=0 5x^2-6x+1=0

Video Solution

Solution Steps

00:00 Find X
00:04 Identify the coefficients
00:14 Use the roots formula
00:32 Substitute appropriate values according to the given data and solve
00:59 Calculate the square and products
01:16 Calculate the square root of 16
01:33 These are the 2 possible solutions (addition,subtraction)
01:42 And this is the solution to the question

Step-by-Step Solution

To solve the quadratic equation 5x26x+1=0 5x^2 - 6x + 1 = 0 , we will use the quadratic formula:

x=b±b24ac2a x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

Identify the coefficients: a=5 a = 5 , b=6 b = -6 , and c=1 c = 1 .

Step 1: Calculate the discriminant using b24ac b^2 - 4ac .
The discriminant is (6)24×5×1=3620=16 (-6)^2 - 4 \times 5 \times 1 = 36 - 20 = 16 .

Step 2: Find the solutions using the quadratic formula.
x=(6)±162×5 x = \frac{-(-6) \pm \sqrt{16}}{2 \times 5}
This simplifies to x=6±410 x = \frac{6 \pm 4}{10} .

Step 3: Calculate both solutions.
First solution: x1=6+410=1010=1 x_1 = \frac{6 + 4}{10} = \frac{10}{10} = 1
Second solution: x2=6410=210=15 x_2 = \frac{6 - 4}{10} = \frac{2}{10} = \frac{1}{5} .

Therefore, the solutions to 5x26x+1=0 5x^2 - 6x + 1 = 0 are x1=1 x_1 = 1 and x2=15 x_2 = \frac{1}{5} .

The correct choice from the given options is:

x1=1,x2=15 x_1=1,x_2=\frac{1}{5}

Answer

x1=1,x2=15 x_1=1,x_2=\frac{1}{5}