Which polynomial identity will prove that 49 = (2 + 5)2?

Difference of Squares

Difference of Cubes

Sum of Cubes

Square of a Binomial

Question

Which polynomial identity will prove that 49 = (2 + 5)2?

Difference of Squares

Difference of Cubes

Sum of Cubes

Square of a Binomial

anonymous · Answer

as is clear on your equation, 49 is a square given by 7x7
as is clear in your equation,    4 is a square given by 4x4

the operator given is - ( minus) 

you have two squares, and a difference sign

a^2 - b^2  = (a-b)(a+b)

7^2  -2^2  = (7-2)(7+2)
                  =   (5)(9)
                  =     45