(5х-1)(5х+1)-(5х-3)²=50
25х²-1-(25х²-30х+9)=50
25х²-1-25х² +30х-9=50
30х-10=50
30х=60
x=2
(6а-2)^2=36а^2-24а+4
(5b+6)^2=25b^2+60b+36
(4+2a)^3=64+96a+32a^2+8a^3
(2a-1)^3=8a^3-12a^2+6a-1
(1/6 + 1 1/10) * 24 = (5/30 + 1 3/30) * 24 = 1 8/30 * 24 = 1 4/15 * 24 = 19/15 * 24 = (19 * 24)/15 = (19 * 8)/5 = 152/5 = 304/10 = 30,4
Ответ: 30,4.
<span>5 x - 1 = 0
5х=1
х=1/5
x=0.2</span>
9/11-9/22 *44/9=9/11- 1/1*2/1=9/11-2=9/11-22/11 =-13/11 =-1 2/11