multiply:
a)(2x+5)(2x-5) b) -4x^3(6x-3x^4)
show your work. please help me!!
a )
( 2 x + 5 )( 2 x - 5 ) =
2 x * 2 x + 2 x * 5 - 5 * 2 x - 5 * 5 =
4 x ^ 2 + 10 x - 10 x - 25 =
4 x ^ 2 - 25
a)(2x+5)(2x-5) b) -4x^3(6x-3x^4)
show your work. please help me!!
( 2 x + 5 )( 2 x - 5 ) =
2 x * 2 x + 2 x * 5 - 5 * 2 x - 5 * 5 =
4 x ^ 2 + 10 x - 10 x - 25 =
4 x ^ 2 - 25