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Solve the equation [tex][tex]$x^2 - 10x - 7 = 0$[/tex][/tex] by completing the square.

(Note: Input Box 1 should contain the constant and Input Box 2 should contain the number inside the radical.)

[tex][tex]$x = $[/tex] \square \pm \sqrt{} \square$[/tex]


Sagot :

To solve the equation [tex]\(x^2 - 10x - 7 = 0\)[/tex] by completing the square, follow these steps:

1. Start with the original equation:
[tex]\[ x^2 - 10x - 7 = 0 \][/tex]

2. Move the constant term to the other side of the equation by adding 7 to both sides:
[tex]\[ x^2 - 10x = 7 \][/tex]

3. To complete the square, take half of the coefficient of [tex]\(x\)[/tex], square it, and add it to both sides of the equation. The coefficient of [tex]\(x\)[/tex] is [tex]\(-10\)[/tex]. Half of [tex]\(-10\)[/tex] is [tex]\(-5\)[/tex], and squaring it gives [tex]\(25\)[/tex]:
[tex]\[ x^2 - 10x + 25 = 7 + 25 \][/tex]

4. Rewrite the left side as a perfect square and simplify the right side:
[tex]\[ (x - 5)^2 = 32 \][/tex]

5. Take the square root of both sides:
[tex]\[ x - 5 = \pm \sqrt{32} \][/tex]

6. Solve for [tex]\(x\)[/tex] by isolating it:
[tex]\[ x = 5 \pm \sqrt{32} \][/tex]

Therefore, the solution for the equation [tex]\(x^2 - 10x - 7 = 0\)[/tex] is:

- [tex]\(x = 5 \pm \sqrt{32}\)[/tex]

So, in Input Box 1, you should enter the constant [tex]\(5\)[/tex], and in Input Box 2, you should enter the number inside the radical, which is [tex]\(32\)[/tex].

[tex]\[ x = \boxed{5} \pm \sqrt{ \boxed{32}} \][/tex]