Question

subtract the second expression from the first expression 2a +b,a+b. x+2y+z,-x-y-3z

Answer 1

Answer:

$i ) \green {a}$

$ii ) \green { 2x+3y+4z }$

Step-by-step explanation:

$i) Let \: A = 2a+b, \: B = a+b$

$A - B = 2a + b - ( a + b )\\= 2a + b - a - b \\= 2a - a + b - b \\=\green {a}$

$ii ) Let \: P = x + 2y + z ,\: Q = -x - y - 3z$

$P - Q = x + 2y + z - ( -x - y - 3z )\\= x + 2y + z + x + y + 3z \\= x + x + 2y + y + z + 3z \\= \green { 2x+3y+4z }$

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Answer 2

1st one is a

2nd one is 2x+3y+4y