Select the correct answer.
The vertices of a parallelogram are AlX1. Y1). BlX2, y2), CX3. Y3), and D(X4. Yd). Which of the following must be true if parallelogram ABCD is proven
to be a rectangle?
OA
and
-1
OB.
(94-
and
Ос.
and
D.
and
= -1

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

if im not mistaking its

step-by-step explanation:  

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation: