Question

Simplify : (a + 2b − 3c)² − (a − 2b + 3c)²

Answer 1

Answer:

${(a + 2b - 3c)}^{2} - {(a - 2b + 3c)}^{2}$

since

${a}^{2} - {b}^{2} = (a - b)(a + b)$

$((a + 2b - 3c) - (a - 2b + 3c))((a + 2b - 3c) + (a - 2b + 3c))$

$(a + 2b - 3c - a + 2b - 3c)(a + 2b - 3c + a - 2b + 3c)$

$(4b - 6c)(2a)$

$8ab - 12ac$

Answer 2

Answer:

6(a+2b+3c)=

6a+12b+18c

Step-by-step explanation:here