Question
Real Tutor Solution
Tutor-Verified Answer
Answer
\( x = 3 \) หรือ \( x = -3 \)
Solution
สมการ: \( x^{2} = 9 \)
**การแก้สมการ:**
1. เริ่มต้นจากสมการ:
\[
x^{2} = 9
\]
2. หา \( x \) โดยการถอดกำลังสองทั้งสองด้านของสมการ:
\[
x = \pm \sqrt{9}
\]
3. คำนวณค่ารากที่สองของ 9:
\[
\sqrt{9} = 3
\]
4. ดังนั้น:
\[
x = \pm 3
\]
**คำตอบ:**
\[
x = 3 \quad \text{หรือ} \quad x = -3
\]
Reviewed and approved by the UpStudy tutoring team
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Simplify this solution Mind Expander
Let's take a fun dive into the world of squares! The equation \( x^{2} = 9 \) means you're looking for numbers that, when multiplied by themselves, equal 9. That’s like asking which two identical superheroes can join forces to create 9. The answer? \( x \) can be either 3 or -3, since both \( 3^{2} \) and \( (-3)^{2} \) fly back to 9! Now, here’s a cool twist: this equation's like a puzzle! When you see the squared term, you might immediately think of taking the square root. But remember, it’s not just one answer—you’ve got two! So don't forget to check both positive and negative possibilities when you’re solving similar equations. It’s the superhero way!
