11. 11 - a when a = -3

12.x^3 when x =-3

pls helppp step by step

11) 14

12) -27

Step-by-step explanation:

11-a when a=-3

Plug in -3 into the equation

11-(-3)

A negative times a negative becomes a positive

So the equation becomes 11+3

Answer is 14

x³ when x=-3

Plug in -3 into the equation

-3³

Solve, which should give you -27

a

step-by-step explanation:

hello from mrbilldoesmath!

answer:   (7x + 6y) ( 49x^2 - 42xy + 36y^2)

discussion:

in general, the factorization of a^3 + b^3 is

a^3 + b^ 3 = (a + b) ( a^2 - ab + b^2)

in our case note that 343 = 7^3 and 216 = 6^3 so the equation becomes:

343x^3 + 216y^3 = (7x)^3 + (6y)^3

if you think of a (above) as 7x and b as 6y the factorization becomes

343x^3 + 216y^3 =

((7x + 6y) (   (7x)^2 - 7x*6y + (6y)^2)   =

(7x + 6y) ( 49x^2 - 42xy + 36y^2)

you,

mrb

(a + b) (a^2 - a b + b^2)