Question

ДАЮ 29 БАЛЛОВ!!!!1. (a-1)^2/b+5:5a-5/2b+10 2.4x/5x-10-x/x-4 3.(x+1)^2/6+(x-1)^2/12-x^2-1/4=1.НУЖНО СРОЧНО

Answer 1

$\frac{(a - 1) {}^{2} }{b} + \frac{5}{5a} - \frac{5}{2b} + 10 \\ \frac{2(a - 1) {}^{2} }{2b} - a - \frac{5}{2b} + 10 \\ \frac{2(a - 1)(a + 1) - 5}{2b} - a + 10 \\ \frac{2a {}^{2} + 2a - 2a - 2 - 5 - 2ab + 20b}{2b} \\ \frac{2a {}^{2} - 2ab + 20b - 7 }{2b}$