A12-foot by 15-foot patio is increased by placing a stone border around the patio. the width of the border is the same all the way around the patio. the perimeter of the patio is extended by 74 feet. the equation which represents x, the width of the border is 2[(12+2x)+(15+2x)]=74

think about it deeply and passionately about this property

i am sorry

the answer is the third / last answer

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)

its perfect good job honey

step-by-step explanation:

awesome job girl