2х(в кв)+7х-9=0
Д=7(в кв)-4*2*(-9)=121
Х1=(-7+11):4=4:4=1
Х2=(-7-11):4=-18:4=-4,5
Ответ:1;-4,5
100х(в кв)-16=0
Д=0-4*100*(-16)=6400
Х1=(0+80):200=2:5
Х2=(0-80):200=-2:5
Ответ:2:5;-2:5
<span>3х(в кв)=18х</span>
3х(в кв)-18х=0
Д=324-4*3*0=324
Х1=(18+18):6=6
Х2=(18-18):6=0
Ответ:6;0
<span>х(в кв)-16х+63=0</span>
Д=256-4*1*63=4
Х1=(16+2):2=9
Х2=(16-2):2=7
Ответ:7;9
<span>3х(в кв)+13х+10=0</span>
<span>Д=169-4*3*10=49</span>
<span>Х1=(-13+7):6=-1</span>
<span>Х2=(-13-7):6=-10:3</span>
<span>Ответ:-1;-10:3</span>
<span><span>16х(в кв)=49 </span></span>
<span><span>Д=0-4*16*(-49)=3136</span></span>
<span><span>Х1=(0+56):32=7:4</span></span>
<span><span>Х2=(0-56):32=-7:4</span></span>
<span><span>Ответ:7:4;-7:4</span></span>
<span><span><span>2х(в кв)-3х=0</span></span></span>
<span><span><span>Д=9-4*2*0=9</span></span></span>
<span><span><span>Х1=(-9+3):4=-1,5</span></span></span>
<span><span><span>Х2=(-9-3):4=-3</span></span></span>
<span><span><span>Ответ:-1,5;-3</span></span></span>
<span><span><span><span>х(в кв)-2х-35=0</span></span></span></span>
<span><span><span><span>Д=4-4*1*(-35)=144</span></span></span></span>
<span><span><span><span>Х1=(2+12):2=7</span></span></span></span>
<span><span><span><span>Х2=(2-12):2=-5</span></span></span></span>
<span><span><span><span>Ответ:7;-5</span></span></span></span>
<span><span><span><span><span>(х+3)в кв=2х+6</span></span></span></span></span>
<span><span><span><span><span>х(в кв)+4х+3=0</span></span></span></span></span>
<span><span><span><span><span>Д=16-4*1*3=4</span></span></span></span></span>
<span><span><span><span><span>Х1=(-4+2):2=-1</span></span></span></span></span>
<span><span><span><span><span>Х2=(-4-2):2=-3</span></span></span></span></span>
<span><span><span><span><span>Ответ:-1;-3</span></span></span></span></span>
(х-3)(х+3)=5х-13
х(в кв)-5х+4=0
Д=25-4*1*4=9
Х1=(5+3):2=4
Х2=(5-3):2=1
Ответ:4;1.
