Question

17. (a - b) + (b -c)+(c - a)3​

Answer 1

3 is the correct answer

Answer 2

$\huge\mathbb{SOLUTION}$

(a-b)+(b-c)+(c-a)3

= a-b+b-c+3c-3a

= a-3a-c+3c

= -2a + 2c

Take 2 as a common

= -2( a-b )

Note :-

Same sign = addition

opposite sign = subtraction

Some algebraic formulae

• (a+b)² = a² + b²+ 2ab
• (a-b)² = a² + b² - 2ab
• a² - b² = (a+b) (a-b)
• a³+b³ = (a+b)(a²-ab+b²)
• a³-b³ = (a-b)(a²+ab+b²)