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Спростіть вираз
1) (m-3)(m+3)-m(m+2);
2) (3a+5)-(2-a);
3)(x+8)(x-8)-x(x-6);
4) 2x(x+1)-(x²-3).
Спростіть вираз
1) (m-3)(m+3)-m(m+2);
2) (3a+5)-(2-a);
3)(x+8)(x-8)-x(x-6);
4) 2x(x+1)-(x²-3).
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Answers & Comments
(3а+5)-(2-а) = 3а+5-2+а = 4а+3
(х+8)(х-8) - х(х-6) = х²-64-х²+6х = 6х-64
2х(х+1) - (х²-3) = 2х²+2х-х²+3 = х²+2х+3