Answer:
= 625x^4 + 500x^3 y + 150x^2•y^2 + 20xy^3 + y^4
Explanation:
1. Use the Binomial Theorem.
( 5 x ) 4 + 4 ( 5 x ) 3 y + 6 ( 5 x ) 2 y 2 + 4 ( 5 x ) y 3 + y 4
STEPS
Apply the product rule to 5x.
5^4 x^4 + 4(5x)^3y + 6( 5x )^2y^2 + 4(5x)^y3 + y^4
Raise 5 to the power of 4.
625x^4 + 4(5x)^3y + 6(5x)^2y^2 + 4(5x)y^3 + y^4
Apply the product rule to 5x.
625^x^4 + 4( 5^3•x^3) y + 6(5x)^2y^2 + 4(5x)^y^3 + y^4
Raise 5 to the power of 3.
625x^4 + 4(125x^3) y + 6(5x)^2y^2 + 4(5x)y^3 + y^4
Multiply 125 by 4.
625x^4 + 500x^3•y + 6 ( 5 x )^2y^2 + 4(5x) y^3 + y^4
Apply the product rule to 5x.
625x^4 + 500x^3y + 6(5^2• x^2 )y^2 + 4(5x)y^3 + y^4
Raise 5 to the power of 2.
625 x 4 + 500 x 3 y + 6 ( 25 x 2 ) y 2 + 4 ( 5 x ) y 3 + y 4
Multiply 25 by 6.
625 x 4 + 500 x 3 y + 150 x 2 y 2 + 4 ( 5 x ) y 3 + y 4
Multiply 5 by4 .
625 x 4 + 500 x 3 y + 150 x 2 y 2 + 20 x y 3 + y 4
2. Simplify each term.
625x^4 + 500x^3 y + 150x^2•y^2 + 20xy^3 + y^4