Screenshot is in the comments. (X-2)^2-9=72

Question

Someoneee · Answer

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Imagine · Answer

Are you asking how to solve this equation?

Someoneee · Answer

Yes. Using the square root method.

Imagine · Answer

$$(x-2)^2-9=72$$
Well, It firstly asked for an exact method. So let's do that first.
$$x^2+4-9=72$$
Combine like terms;
$$x^2-5=72$$
Add 5 to the 72.
$$x^2=77$$
$$x=8.78$$

Imagine · Answer

That is the approximate soultion~ not the exact*

Imagine · Answer

Snow- could you finish the question, please.
tyvm

snowflake0531 · Answer

uh I think you did it wrong

Someoneee · Answer

The first thing I did was add 9 to both sides of the equation, cancelling the 9 and turning the 72 into 81. Then I'm left with (x-2)^2 = 81 I want to know what I should do next.

Someoneee · Answer

-9*

snowflake0531 · Answer

@someoneee wrote:

The first thing I did was add 9 to both sides of the equation, cancelling the 9 and turning the 72 into 81. Then I'm left with (x-2)^2 = 81 I want to know what I should do next.

Yea you're correct this xd So you can square root both sides to -9 and positive 9 $$x-2 = \pm 9$$ so then solve for both solutions I don't think that there are any 'approximate solutions' in this o-O

snowflake0531 · Answer

Or you can do it the quadratic formula way, factoring the square out, and them making it into the form ax^2 + bx + c, in that way, you'll make more sense of the plus nad minus thing

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