Answer:
21
Explanation:
t^2 = (-3) * (-3) = 9
4t = -3 * 4 = -12
t^2 - 4t = 9 - (-12) = 9 + 12 = 21
Plug in -3 for t in the expression t²-4t.
Simplify:
So the answer is 21.
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