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Evaluate the expression for u=−4u = -4.\newline−2u=-2u = _____

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Full solution

Q. Evaluate the expression for u=−4u = -4.\newline−2u=-2u = _____
  1. Write −2u-2u: Write −2u-2u after substituting u=−4u = -4.\newlineSubstitute −4-4 for uu in −2u-2u.\newline−2(−4)-2(-4)
  2. Substitute −4-4 for uu: Evaluate −2(−4)-2(-4).\newline−2(−4)-2(-4)\newline=8= 8

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