<span><span>(5a</span></span>⁹<span><span>-3a</span></span>⁷<span><span>)/4a</span></span>⁸<span><span>=
a</span></span>⁷<span><span>(5a</span></span>²<span><span>-3)/4a</span></span>⁸<span><span>=(5a</span></span>²<span><span>-3)/4a
</span>при а=-1
получается:
(5*(-1)</span>²<span>-3)/4(-1)=5-3/-4=-1/2=-0,5</span>
3х+у
при х=-6 и у=7
3*(-6)+7=(-18)+7= -11
-3x-y
<span>при x= -6 и y=7
</span>-3*(-6)-7=18-7=11
11 больше (-11) -3x-y больше 3x+y
<span>|7-x|=|2x-5|
</span>7-x=2x-5 и <span>7-x=-(2x-5)
</span>7-x=2x-5 и <span>7-x=-2x+5
</span>-3x=-12 и <span>x=-2
</span>x=4 и <span>x=-2</span>
1) <span>√2х² + 4√3х - 2√2=0
D = (4</span>√3)^2 - 4*√2*2√2= 48 - 32 = 16 D>0
Х1 = -4√3 + √16/2√2 = -2√3 + 4/√2
Х2 = -4√3 - √16/2√2 = 2√3 - 4/√2