Hi,



factoring

(2x + 9y)(2x - 9y)

Checking with FOIL

F	First terms  4x^2

O	Outside terms -18xy

I	Inside terms  +18xy

L	Last terms    -81y^2

  

RELATED QUESTIONS

(2x/3y)(9y/4x2) (answered by lynnlo)

(2x+9y)^2 (answered by jim_thompson5910)

Question:
Which equation describes an ellipise?

(A) -3x^2-7x-3y^2-9+0

(B)... (answered by venugopalramana)

Which equation describes an ellipise? 
(A) -3x^2-7x-3y^2-9+0 
(B) 2x^2-7x+4y^2-9y= -13 
 (answered by venugopalramana)

Which is the x-intercept of -2x = 9y - 18.       a. -9, b. -2, c. 2, d.... (answered by mananth)

(2x^2+9y^2-8)-(7x^2+9y^2-3) (answered by MathLover1)

completely factor the expression 16x^4-81y^4
a. (2x+3y)(2x-3y)(4x^2+9y^2)
b. prime
c.... (answered by Tatiana_Stebko)