Question

simplify the expression. write the answer in exponent form. t^7xt^7

Answer 1

Do you mean:
\(\large t^7 \times t^7\)

Answer 2

If you do mean that then since this expression has two bases that are the same you just need to add the exponents.

\(\large \color {purple} {x^a \times x^b = x^{a + b}}\)