Question

find the sum of the following
5. p + 2q - 4r, 2p - 3q + 5r, 3p-q + 2r​

Answer 1

$\huge{\underline{\sf solution:-}}$

$\\ {:}\dashrightarrow (p+2q-4r)+(2p-3q+5r)+(3p-q+2r)$

$\\ {:}\dashrightarrow p+2q-4r+2p-3q+5r+3p-q+2r$

• Combine like terms

$\\ {:}\dashrightarrow p+2p+3p+2q-3q-q-4r+5r+2r$

$\\ {:}\dashrightarrow 3p+3p+2p-4q+1r+2r$

$\\ {:}\dashrightarrow 6p-2q+3r$

Answer 2

(P + 2q - 4r) + (2p - 3q + 5r) + (3p - q + 2r)

P + 2q - 4r + 2p - 3q + 5r + 3p - q + 2r

p + 2p + 3p + 2q - 3q - q - 4r + 5r + 2r

6p - 2q + 3r