Question Simplify the expression 21t−2 Evaluate t×21−2Solution 21t−2 Show Solution Factor the expression 21(t−4) Evaluate t×21−2Use the commutative property to reorder the terms 21t−2Solution 21(t−4) Show Solution Find the roots t=4 Evaluate t×21−2To find the roots of the expression,set the expression equal to 0 t×21−2=0Use the commutative property to reorder the terms 21t−2=0Move the constant to the right-hand side and change its sign 21t=0+2Removing 0 doesn't change the value,so remove it from the expression 21t=2Multiply by the reciprocal 21t×2=2×2Multiply t=2×2Solution t=4 Show Solution