Expand 3 brackets

[@michaelempeigne3519]

make life even easier by using the roots to do the multiplying : 2 * ( x + ( 1 / 2 ) ) * ( x + 5 ) ( x - 5 ) = 2 * [ x^3 + ( 5 - 5 + 1 / 2 ) * x^2 + [ ( 1 / 2 ) * ( 5 - 5 ) + 5 * ( - 5 ) ] * x + ( 1 / 2 ) * 5 * ( - 5 ) ] so this makes 2 * [ x^3 + ( 1 / 2 )x^2 - 25x - 25 / 2 ] = 2x^3 + x^2 - 50x - 25

[@MathsWithJay]

Thank you....but is that really simpler?

[@michaelempeigne3519]

@@MathsWithJay this can be extended to any number of factors.

[@justsomeone61]

HIII !! Thank you so much for your explanation!! Can you please help with this : A= 2^0+2^1+2^2+.....+2^49+2^50

[@MathsWithJay]

See kzbin.info/www/bejne/e6PJhJmblpWAnpI

[@michaelempeigne3519]

that is (2^51) - 1