Question

evaluate (2a)^2b^3-a^2) when a=-3 and b =2

Answer 1

\(\bf [(2{\color{brown}{ a}})^2{\color{purple}{ b}}^3-{\color{brown}{ a}}^2] \qquad {\color{brown}{ a}}=-3 \qquad {\color{purple}{ b}} =2\implies [(2\cdot {\color{brown}{ -3}})^2\cdot {\color{purple}{ 2}}^3-({\color{brown}{ -3}})^2]\)