Cool Down
Here is someone's solution to the equation .
Step 1 -
Step 2 - , ,
Step 3 -
Step 4 -
Step 5 -
Step 6 -
No Solutions
Identify as many errors as you can and briefly explain each error.
Compare your answer:
- is -4, so in Step 4, the value should be -(-4), which is 4.
- In Step 1, the equation should be rewritten as , so the constant term is -20, not 20. So, in Step 4, the last part of the numerator should be .
- In Step 4, should be 16. Squaring a negative number gives a positive number.
- If the earlier issues were fixed, then the values under the square root symbol would be or 256.