mentalmaths

SIMPLIFY [x+1][y+1]+[x-1][x+1]?

Posted:
3+ months ago by mentalmaths
Topics:
maths
Answer this Question Report Mark as Favorite

Answers (1)

PhiBonacci

a:= (x+1) (y+1) = xy + x + y + 1
b:= (x+1) (x-1) = x² -1

a + b = x² + xy + x + y

Votes: +0 / -0
Comment Vote up Vote down Report