The following steps are used to rewrite the polynomial expression (x + 4y + 2)(x – 7y). Step 1: x(x - 7y) + 4y(x - 7y) + z(x – 7y)
Step 2: x2 - 7xy + 4yx - 28y2 + zx - 7zy
Step 3: x? - 7xy + 4xy - 28y2 + xz - 7yz
Step 4: x2 - 3xy - 28y2 + xz - 7yz
Identify the property used in each of the steps:
Step 1:
distributive property

step-by-step explanation:

im not sure what the answer is

hello from mrbilldoesmath!

answer:

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

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

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

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb

sasasadaassasasasa opk ok you know