x^4+6x^3+9x^2-14x^2-42x+40=0
см. прикрепленное вложение
___________________________
<span>решите неравенство
-7+4х>5
4x > 5+7 = 12
x > 12/4 = 3
x > 3</span>
а)9*х^2*у/10 (тут все возводится)
б)<span>-2<span>√</span>а+<span>√</span>b +3<span>√</span>b =4<span>√</span>b - 2<span>√</span>а</span>
<span>в)3<span>√</span>2+<span>√</span>(16*2) - <span>√</span>(25*2)=3<span>√</span>2 + 4<span>√</span>2 - 5<span>√</span>2 = 2<span>√</span>2</span>
<span>г)<span>х+2<span>√</span>х*у +у-2<span>√</span>ху=х+у</span></span>