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Evaluate -1-(-z) where z=-2.

Evaluate −1−(−z) -1-(-z) where z=−2 z=-2 .

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Composition of linear and quadratic functions: find a valueright chevron icon

Full solution

Q. Evaluate −1−(−z) -1-(-z) where z=−2 z=-2 .
  1. Identify and Substitute zz: Identify the value of zz and substitute it into the expression.\newlineWe are given that z=−2z = -2. We need to substitute −2-2 for zz in the expression −1−(−z)-1-(-z).
  2. Substitute zz in Expression: Substitute −2-2 for zz in the expression.\newlineThe expression becomes −1−(−(−2))-1-(-(-2)).
  3. Simplify Double Negative: Simplify the double negative inside the parentheses.\newlineThe expression −(−2)-(-2) becomes +2+2 because a negative times a negative is a positive.\newlineSo, the expression now is −1+2-1 + 2.
  4. Perform Addition: Perform the addition.\newlineNow we add −1-1 and 22 together.\newline−1+2-1 + 2 equals 11.

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