# How do you evaluate the expression (-7)^2(-7) using the properties?

Mar 17, 2017

${x}^{a} \cdot {x}^{b} = {x}^{a + b}$
${\left(- 7\right)}^{2} {\left(- 7\right)}^{1} = {\left(- 7\right)}^{2 + 1} = {\left(- 7\right)}^{3}$
${\left(- 7\right)}^{3} = - 7 \cdot - 7 \cdot - 7 = - 343$