Question

Simplify (2x-5y)^3_(2x+5y)^3

Answer 1

Answer:

10/3

Step-by-step explanation:

2x-5y/3-(2x+5y)/3

2x-5y-(2x+5y)/3

2x-5y-2x-5y/3

-5y-5y/3

-10y/3

y=10/3

Answer 2

hi mate,

(2x-5y)³-(2x+5y)³

a³-b³ = (a-b)(a²+b²+ab)

=> (2x-5y-2x-5y)[{2x-5y}²+{2x+5y}²+(2x-5y)(2x+5y)]

=> -10y(4x²+25y²-20xy+ 4x²+25y²+20xy+4x²-25y²)

(a+b)(a-b) = a²-b²

= -10y(12x²+25y²)

i hope it helps you.