Question

simplify (a+b-c) (a-b+c)​

Answer 1

Answer:

(a+b-c)(a-b+c) = a²-b²-c²+2bc

Step-by-step explanation:

(a+b-c)(a-b+c)

= [a+(b-c)][a-(b-c)]

= a²-(b-c)²

/* By algebraic identity:

(x+y)(x-y) = x²-y² */

= a² - (b²-2bc+c²)

/* By algebraic identity:

(x-y)² = x²-2xy+y² */

= a²-b²+2bc-c²

= a²-b²-c²+2bc

•••♪

Answer 2

Answer:

Step-by-step explanation: