Решение:
98х^5-18х^3/7х-3 * 5/(7х+3) = 2х^3*(49x^2-9)/7x-3 * 5/7x+3 = 2x^3*(7x-3)×(7x+3)/7x-3 * 5/7x+3 = 2x^3*5 = 10x^3
При x=2
10x^3 = 10 * 2^3 = 10 * 8 = 80
Ответ: 80
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Решение:
98х^5-18х^3/7х-3 * 5/(7х+3) = 2х^3*(49x^2-9)/7x-3 * 5/7x+3 = 2x^3*(7x-3)×(7x+3)/7x-3 * 5/7x+3 = 2x^3*5 = 10x^3
При x=2
10x^3 = 10 * 2^3 = 10 * 8 = 80
Ответ: 80
————————— • —————- =
7•2-3. 7•2+3
6272-144. 5. 6128 5
= ————— • ——- = ——— • ——- =
11 17. 11. 17
= 30640
—————. = 163, 85
187