if : a = 2x-3y+2, b= 5x + 2y -3z , c= 3x-4y+2z . find 1. a+b-c, 2. a-3b+4c
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Answer:
1. a +b -c
= 2x-3y+2+5x+2y-3z-(3x-4y+2z)
= 2x+5x -3x-3y+2y+4y-3z-2z+2
=4x+3y-5z+2
Step-by-step explanation:
2. 2a= 2(2x-3y+2)= 4x-6y+4
-3b= 3(5x+2y-3z) = -15x-6y+9z
4c= 4(3x-4y+2z) = 12x-16y+8z
(ii) 2a-3b+4c = x-28y+17z +4
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ANSWER:-
1. a+b-c
=putting the value:-
= 2x - 3y + 2 + 5x + 2y - 3z - 3x - 4y +2z
= 4x - 5y - 1z +2. Ans.....
2. a-3b+4c
= putting the value:-
= 2x - 3y +2 - 3[5x + 2y - 3z] + 4[3x - 4y +2z]
= 2x - 3y + 2 - 15x - 6y + 9z + 12x - 16y + 8z
= - 1x - 25y + 17z + 2. Ans.....
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