Question

Factories : a(a-1)-b(b-1)

Answer 1

Hello !!



We have :


a ( a - 1 ) - b ( b - 1 ) = a² - a - b² + b





=> ( a² - b²) - ( a - b )



=> ( a - b ) [ ( a + b ) -1 ] = ( a - b ) ( a + b -1)


Hence,


a ( a - 1 ) - b ( b - 1 ) = ( a - b ) ( a + b - 1 ).



★ HOPE IT WILL HELP YOU ★

Answer 2

${a}^{2} - a- {b}^{2} - b \: \\ a + b \times a - b - - b$
solve