Question

−9m(9m2+8)−8m(−8m2+3)

Answer 1

$-9m(9m^2+8)-8m(-8m^2+3)=-81m^3-72m+64m^3-24m=-17m^3-96m$

Answer 2

To simplify the expression, let's first distribute the terms:

-9m(9m^2 + 8) - 8m(-8m^2 + 3)

Now, apply the distributive property:

= -81m^3 - 72m - (-64m^3 + 24m)

Remember that multiplying by a negative number is the same as changing the sign, so -(-64m^3 + 24m) becomes +64m^3 - 24m:

= -81m^3 - 72m - 64m^3 + 24m

Now, combine like terms:

= (-81m^3 - 64m^3) + (-72m + 24m)

= -145m^3 - 48m

The simplified expression is:

-145m^3 - 48m