Question

Simplify ( 1 - x)(1 + x ) - 1 and find its value for x = 1/2
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Answer 1

Answer:

-1/4

Step-by-step explanation:

• (1-x)(1+x)-1
• using a^2-b^2=(a-b ) (a+b)
• 1^2 - x^2 -1
• 1-x^2-1
• -x^2
• -(1/2)^2
• -1/4