Question Factor the expression 21(2−t) Evaluate 1−21tSolution 21(2−t) Show Solution Find the roots t=2 Evaluate 1−21tTo find the roots of the expression,set the expression equal to 0 1−21t=0Move the constant to the right-hand side and change its sign −21t=0−1Removing 0 doesn't change the value,so remove it from the expression −21t=−1Change the signs on both sides of the equation 21t=1Multiply by the reciprocal 21t×2=1×2Multiply t=1×2Solution t=2 Show Solution
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