Question

Each expression has been simplified incorrectly. Explain the mistake that occurred ,and then make the correction.

(-2×7)³=8×7³

Answer 1

Explanation:

Remarks

The answer given is pretty close to being correct. The 8 is correct -- that is 2^3 power.

The problem is in the minus sign. Think of it as (-1)^3

(-1)^3 = -1 * -1 * -1.

There are 3 minuses there. 2 of them will make plus 1. The third one will change the result to - 1.

Answer: 8 should be -8