SOLUTION: please help me solve:(-8x7 + 5x9 - 1 + 3x8) - (7 + 7x8 + 7x9 + 2x7)

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Question 290744: please help me solve:(-8x7 + 5x9 - 1 + 3x8) - (7 + 7x8 + 7x9 + 2x7)

Answer by gsmani_iyer(201) About Me  (Show Source):
You can put this solution on YOUR website!

(-8x7 + 5x9 - 1 + 3x8) - (7 + 7x8 + 7x9 + 2x7)
= %28-8x%5E7%2B5x%5E9-1%2B3x%5E8%29-%287%2B7x%5E8%2B7x%5E9%2B2x%5E7%29..Let us now remove the curved brackets. Keep one thing in your mind : if negative sign is found immediately before the bracket, then change all the signs inside the bracket. In the second bracket, we find -ve sign before the bracket starts. so we will change all the signs inside the bracket.
= -8x%5E7%2B5x%5E9-1%2B3x%5E8-7-7x%5E8-7x%5E9-2x%5E7 Now arrange the terms degree-wise and simplify.
= 5x%5E9-7x%5E9%2B3x%5E8-7x%5E8-8x%5E7-2x%5E7-1-7
= -2x%5E9-4x%5E8-10x%5E7-8 Answer.
I hope this is clear to you. Feel free to contact me anytime for any doubts in maths. I am available atleast 18 hours online.