Knowee
Questions
Features
Study Tools

Solve the equation for all values of x by completing the square.x, squared, minus, 8, x, equals, 3x 2 −8x=3

Question

Solve the equation for all values of x by completing the square.

Given the equation:

x28x=3 x^2 - 8x = 3

To solve it, we'll complete the square.

🧐 Not the exact question you are looking for?Go ask a question

Solution

The given equation is x^2 - 8x = 3.

Step 1: Rearrange the equation to have all terms on one side. This gives us x^2 - 8x - 3 = 0.

Step 2: To complete the square, we need to add and subtract (b/2)^2 to the equation. Here, b is the coefficient of x, which is -8. So, (b/2)^2 = (-8/2)^2 = 16.

Step 3: Rewrite the equation as: (x^2 - 8x + 16) - 16 - 3 = 0.

Step 4: The expression in the brackets is a perfect square, so we can write it as (x - 4)^2. This gives us (x - 4)^2 - 19 = 0.

Step 5: Solve for x by taking the square root of both sides: x - 4 = ± sqrt(19), which gives x = 4 ± sqrt(19).

So, the solutions to the equation are x = 4 + sqrt(19) and x = 4 - sqrt(19).

This problem has been solved

Similar Questions

Solve the equation for all values of x by completing the square.x, squared, minus, 8, x, equals, 3x 2 −8x=3

Solve the equation for all values of x by completing the square.x, squared, minus, 40, equals, minus, 6, xx 2 −40=−6x

Solve for xx. Express your answer as an integer or integers or in simplest radical form.8, x, squared, minus, 5, equals, 678x 2 −5=67

Solve the equation for all values of x by completing the square.3, x, squared, plus, 48, x, plus, 189, equals, 03x 2 +48x+189=0

Solve the equation for all values of x by completing the square.x, squared, plus, 63, equals, 16, xx 2 +63=16x

1/3

Upgrade your grade with Knowee

Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.