Question

Simplify: (x + y ) (2x – 3y + z ) – x ( 2x – 3y ) and hence, find its value when
x=1,y=2,z=3. pls give me step by step explanation ( pls be fast I'm in the middle of the exam)

Answer 1

Step-by-step explanation:

The final answer after the substitution of the values of x,y,z is 1

Answer 2

Answer:

(x-y) (2x - 3y + z) - x (2x - 3y)

(1+2) (2(1) - 3(2) + 3) -1 (2(1) - 3(2)

3 (2 - 6+3) -1 (2-6)

3 (5-6) -1 (-4)

3 (-1) 4

-3 (4)

-12