Subtract:

(i) -5xy from 12xy

After subtracting,we get

= 12xy - (- 5xy)

= 5xy + 12xy

= 17xy

(ii) 2a2 from -7a2

After subtracting, we get

= 2a2 + (-7a2)

= -2a2 + 7a2

= -9a2

(iii) 2a-b from 3a-5b

After subtracting, we get

= -(2a – b)+ (3a – 5b)

= -2a + b+ 3a – 5b

= a – 4b

(iv)

After subtracting, we get

= - (2x3 – 4x2 + 3x + 5) + (4x3 + x2 + x + 6)

= - 2x3 + 4x2 – 3x – 5 + 4x3 + x2 + x + 6

= 2x3 + 5x2 – 2x + 1

(v)

After subtracting, we get

= y2 + y2 + y – 2 - y3 + y2 + 5

= y3 + y2 + y + 3

= y3 + y2 + y + 3

(vi)

After subtracting, we get

= x + y - z – (x - y - z)

= x - x + y + y - z + z

= + +

= + +

(vii) x2 - xy2 + xy from x2y + xy2 - xy

= x2y + xy2 - xy – (x2 - xy2 + xy)

= x2y – x2y + xy2 + xy2 - xy - xy

= x2y + xy2 - xy

(viii)

After subtracting, we get

= bc - ac – ( - bc + ac)

= bc + bc - ac - ac -

= + -

= + -

= - -

= – 2ac -

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