Let $a,$ $b,$ and $t$ be real numbers such that $a + b = t.$  Find, in terms of $t,$ the minimum value of $a^2 + b^2.$
Question:
Let $a,$ $b,$ and $t$ be real numbers such that $a + b = t.$  Find, in terms of $t,$ the minimum value of $a^2 + b^2.$
Answer:
Let's think step by step.

user
\frac{t^2}{2}
Let $a,$ $b,$ and $t$ be real numbers such that $a + b = t.$  Find, in terms of $t,$ the minimum value of $a^2 + b^2.$
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