Tolong ya jawabannya pake cara

moga moga bisa kebaca

(4x-5y)^2
= (4x-5y)(4x-5y)
= 4x.4x + 4x(-5y) -5y.4x -5y(-5y)
= 16x^2 - 20xy -20xy +25y^2
= 16x^2 -40xy + 25y^2