Question 647950
Original equation: {{{-5a^2b^3}}}

{{{a = -2}}} and {{{b = -4}}}

Step 1: Replace 'a' and 'b' into the equation

{{{-5(-2)^2(-4)^3}}}

Step 2: We must use order of operations (PEMDAS) in order to solve this correctly. PEMDAS tells us that exponents need to be solved first.

We're going to want to find what {{{(-2)^2}}} is and what {{{(-4)^3}}} is

Step 3: Simplify

{{{-5(-2)^2(-4)^3}}}
{{{-5(4)(-64)}}}

Step 4: Now you can multiply straight across without a problem

{{{-5(4)(-64)}}}
{{{1280}}}

The answer is {{{1280}}}.. you were correct!