Asked by Hadas yoseph

25xsquare-40xy+16y square
Answered by Hadas yoseph
21x. 17y
Answered by Hadas yoseph
What is the answer
Answered by Bosnian
25x^2-40xy+16y^2 = ( 5 x - 4 y)^2

because:

( a - b )^2 = a^2 - 2 • a •b + b^2

25x^2-40xy+16y^2=5^2-2•5•4y+(4y)^2 = (5x-4y)^2