Question

Simplify:
a.
(2-1 - 6-1) × (2-2 - 6-1)-1​

Answer 1

Answer:

$(2 - 1 - 6 - 1) \times (2 - 2 - 6 - 1) - 1 \\ (2 - 1 - 6 - 1) \times ( - 2 + 2 + 6 + 1) \\( - 6) \times ( + 7) \\ - 42$

Answer 2

Step-by-step explanation:

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