Question

product of (x+1) & (x-1)

Answer 1

Answer:

Step-by-step explanation:

( x + 1 ) × ( x - 1 )

= x² - 1

Answer 2

Answer:

(x+1)*(x-1)

cross multiplication

then, (x*x) + (x*1)+(1*x)+(1*1)

addition

x^2 + x+x + 1

= x^2+2x+1