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Solve for [tex]\( u \)[/tex].

[tex]\[ (u-2)^2 = 2u^2 - 7u - 24 \][/tex]


Sagot :

Certainly! Let's solve the equation step-by-step:

Given equation:
[tex]\[ (u - 2)^2 = 2u^2 - 7u - 24 \][/tex]

1. Expand [tex]\((u - 2)^2\)[/tex]:

[tex]\[ (u - 2)(u - 2) = u^2 - 4u + 4 \][/tex]

So, the equation becomes:
[tex]\[ u^2 - 4u + 4 = 2u^2 - 7u - 24 \][/tex]

2. Move all terms to one side to set the equation to zero:

Subtract [tex]\(2u^2 - 7u - 24\)[/tex] from both sides:

[tex]\[ u^2 - 4u + 4 - 2u^2 + 7u + 24 = 0 \][/tex]

Combine like terms:

[tex]\[ u^2 - 2u^2 - 4u + 7u + 4 + 24 = 0 \][/tex]

[tex]\[ -u^2 + 3u + 28 = 0 \][/tex]

3. Multiply through by -1 to simplify the quadratic equation:

[tex]\[ u^2 - 3u - 28 = 0 \][/tex]

4. Solve the quadratic equation [tex]\(u^2 - 3u - 28 = 0\)[/tex]:

To solve, factor the quadratic equation. We are looking for two numbers that multiply to [tex]\(-28\)[/tex] and add up to [tex]\(-3\)[/tex]. These numbers are [tex]\(-7\)[/tex] and [tex]\(4\)[/tex]:

[tex]\[ u^2 - 3u - 28 = (u - 7)(u + 4) = 0 \][/tex]

5. Set each factor equal to zero and solve for [tex]\(u\)[/tex]:

[tex]\[ u - 7 = 0 \quad \text{or} \quad u + 4 = 0 \][/tex]

[tex]\[ u = 7 \quad \text{or} \quad u = -4 \][/tex]

Therefore, the solutions are:

[tex]\[ u = 7 \quad \text{and} \quad u = -4 \][/tex]