[tex] \frac{4y}{ {x}^{2} - {y}^{2} } \div \frac{2y}{8x + 8y} = \frac{4y}{(x - y)(x + y)} \times \frac{8(x + y)}{2y} = \frac{4y \times 8(x + y)}{(x - y)(x + y)2y} = \frac{2 \times 8 \times 1}{(x - y) \times 1 \times 1} = \frac{16}{x - y} [/tex]
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[tex] \frac{4y}{ {x}^{2} - {y}^{2} } \div \frac{2y}{8x + 8y} = \frac{4y}{(x - y)(x + y)} \times \frac{8(x + y)}{2y} = \frac{4y \times 8(x + y)}{(x - y)(x + y)2y} = \frac{2 \times 8 \times 1}{(x - y) \times 1 \times 1} = \frac{16}{x - y} [/tex]
відповідь на фотографії