Question

(с-1)(с+1)-(с+1)(с+2)

Answer 1

(С^2+с-с-1)-(с^2+2c+с+2)=-1-3с+2=1-3с

Answer 2

To simplify the expression, let's expand and combine like terms:

(с - 1)(с + 1) - (с + 1)(с + 2)

Expanding the first bracket, we have: с * с + с * 1 - 1 * с - 1 * 1

Expanding the second bracket, we have: с * с + с * 2 + 1 * с + 1 * 2

Simplifying further by combining like terms: с^2 + с - с - 1 - с^2 - 2с + с + 2

The terms с^2 and -с^2 cancel each other out, as well as the terms -с and с. Simplifying the remaining terms: -1 + 2

The final simplified expression is: 1