Ответ:
второй ответ
Объяснение:
c^2 : 49 - 9d^2 : 169
(c : 7 )^2 - (3d : 13)^2 =
= ( c : 7 - 3d : 13 ) ( c : 7 + 3d: 13 )
[tex]\displaystyle\bf\\\frac{1}{49} c^{2} -\frac{9}{169} d^{2} =\Bigg(\frac{1}{7} c\Bigg)^{2} -\Bigg(\frac{3}{13} d\Bigg)^{2} =\Bigg(\frac{1}{7} c-\frac{3}{13} d\Bigg)\cdot\Bigg(\frac{1}{7} c+\frac{3}{13} d\Bigg)\\\\\\Otvet: \ \Bigg(\frac{1}{7} c-\frac{3}{13} d\Bigg)\cdot\Bigg(\frac{1}{7} c+\frac{3}{13} d\Bigg)[/tex]
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Answers & Comments
Ответ:
второй ответ
Объяснение:
c^2 : 49 - 9d^2 : 169
(c : 7 )^2 - (3d : 13)^2 =
= ( c : 7 - 3d : 13 ) ( c : 7 + 3d: 13 )
[tex]\displaystyle\bf\\\frac{1}{49} c^{2} -\frac{9}{169} d^{2} =\Bigg(\frac{1}{7} c\Bigg)^{2} -\Bigg(\frac{3}{13} d\Bigg)^{2} =\Bigg(\frac{1}{7} c-\frac{3}{13} d\Bigg)\cdot\Bigg(\frac{1}{7} c+\frac{3}{13} d\Bigg)\\\\\\Otvet: \ \Bigg(\frac{1}{7} c-\frac{3}{13} d\Bigg)\cdot\Bigg(\frac{1}{7} c+\frac{3}{13} d\Bigg)[/tex]