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Sagot :

at_explanation_text_math

4

    [    [   x + ( 3 * 2 )  ] /2   ]   + x²

    [   ( x + 6 ) / 2 ]   + x²

    ( 2x² + x + 6 ) / 2

5  

      [ 10 - ( x + 9 )  ] * 7

      ( 10 - x - 9 ) * 7

      ( -x + 1 ) * 7

      -7x + 7

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