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Complete the square so that the left side of [tex]\(x^2 + 8x - 3 = 0\)[/tex] becomes a binomial squared.

[tex]\((x + \square)^2 = \square\)[/tex]


Sagot :

Sure, let's go through the process of completing the square for the equation [tex]\(x^2 + 8x - 3 = 0\)[/tex] step-by-step.

1. Start with the quadratic expression: [tex]\(x^2 + 8x - 3 = 0\)[/tex].

2. Focus on the quadratic and linear terms: [tex]\(x^2 + 8x\)[/tex]. We need to complete the square for this part.

3. Take the coefficient of the [tex]\(x\)[/tex] term (which is 8) and divide it by 2:
[tex]\[ \frac{8}{2} = 4 \][/tex]

4. Square this result:
[tex]\[ 4^2 = 16 \][/tex]

5. Now, add and subtract this square (16) inside the equation to complete the square:
[tex]\[ x^2 + 8x = (x^2 + 8x + 16) - 16 \][/tex]

6. Rewrite the quadratic part as a perfect square and incorporate the constants:
[tex]\[ (x^2 + 8x + 16) - 16 - 3 = 0 \][/tex]
Simplify the constants:
[tex]\[ (x + 4)^2 - 19 = 0 \][/tex]

Therefore, when completing the square, [tex]\(x^2 + 8x - 3 = 0\)[/tex] can be transformed into:
[tex]\[ (x + 4)^2 - 19 = 0 \][/tex]

So, the left side of the equation becomes the binomial squared:

[tex]\[ (x + 4)^2 \][/tex]

And, to fill in the blanks in the steps:
[tex]\( (x + 4)^2 = \ldots \)[/tex]

The result from completing the square is:

[tex]\[ (x + 4)^2 - 19 = 0 \][/tex]