Question

3. SOIV
W
i./ Add: 7a + 2b - C and 4a - 3b +4c →
ii. Subtract: p+q -r from -p-q-r-​

Answer 1

Step-by-step explanation:

i)

$(7a + 2b - c) + (4a - 3b + 4c) \\ (7 + 4)a + (2 - 3)b + ( - 1 + 4)c\\ 11a - b + 3c$

ii)

$( - p - q - r) - (p + q - r) \\ ( - 1 - 1)p + ( - 1 - 1)q + ( - 1 + 1)r \\ - 2p - 2q + 0r \\ = - 2p - 2q$