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MathsWhizz1928
MathsWhizz1928 MathsWhizz1928
  • 12-06-2016
  • Mathematics
Answered

Please help me with these questions! It's an urgent! Thanks! And can u also tell me how to work it out

Please help me with these questions! It s an urgent! Thanks! And can u also tell me how to work it out class=

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  • 19-06-2016
  1. (x-1) (x-1) = x^2 - x - x + 1 = x^2 - 2x + 1

    12. (x+7) (x-7) = x^2 - 7x +7x - 49 = x^2 - 49

    14. 2x + 5 > 3 <=> 2x > -2 <=> x > -1
     Hope you understand :)

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