Pls give me answer of my question,,,,, fast pls refer above photo for question
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1.i) 3x^2-4x-5-(-9x^2+6x-8)
=3x^2-4x-5+9x^2-6x+8
=12x^2-10x+3
ii)Sorry,I don't have enough time to solve this question.
2.i)48a
ii)-24xyz
iii)0.26a^2b
3.i)-ab
ii)21a^2b^2
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