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24 May, 21:43

3x 2 + 2x - 5 and - 4 + 7x 2

-x2 + 9x - 9

21x2 + 2x + 20

10x2 - 5x - 1

10x2 + 2x - 9

+2
Answers (1)
  1. 24 May, 22:04
    0
    Do the like terms first the add both sides so, 3x + 2x + 5+2 = 5x + 7=12x then do the same for the other side and add both answers together!
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