Question

8xcube - 27ycube upon 4xsquare - 9y square

Answer 1

Step-by-step explanation:

Brainly User

the student should not do the FOIL method. The student should recognize immediately that the product will be a2 − b2.

That is skill in algebra.

And the order of factors never matters:

(a + b)(a − b) = (a − b)(a + b) = a2 − b2.

Problem 1. Write only final product..

a) (x + 9)(x − 9) = x2 − 81

b) (y + z)(y − z) = y2 − z2

c) (6x − 1)(6x + 1) = 36x2 − 1

d) (3y + 7)(3y − 7) = 9y2 − 49

e) (x3 − 8)(x3 + 8) = x6 − 64

f) (xy + 10)(xy − 10) = x2y2 − 100

g) (xy2 − z3)(xy2 + z3) = x2y4 − z6

h) (xn + ym)(xn − ym) = x2n − y2m