I Tavi
I Tavi
I Tavi
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saaTSi aavsebs avzis 211 12 ( 1 + 1<br />
x x+2 ) nawils. a.p.T. orive miliT 211<br />
12<br />
saaTSi mTlianad aivso avzi. vwerT gantolebas:<br />
211 12 ( 1 + 1<br />
x x+2 ) = 1 (mTeli avzi 1 erTeulia).<br />
35<br />
12 ( 1 + 1<br />
x x+2 )<br />
= 1; x + 2 + x<br />
x(x + 2)<br />
= 12<br />
35 ;<br />
35x + 35 = 6x 2 + 12x; 6x 2 – 23x – 35 = 0;<br />
23 ±<br />
x =<br />
12<br />
, x 1 = 5; x 2 = – 7<br />
6 .<br />
x + 1<br />
x(x + 2)<br />
= 6<br />
35 ;<br />
pirveli mili avzs avsebs 5 saaTSi, xolo meore _ 7 saaTSi.<br />
SeavseT gamotovebuli adgilebi:<br />
1. b 2 – 4ac-s ? ewodeba.<br />
2. mocemulia ax 2 + bx + c = 0 (1) gantoleba, Tu D>0, maSin (1)<br />
gantoleba aqvs ? amonaxsens Tu D0.<br />
3 amoxseniT kvadratuli gantoleba:<br />
a) x 2 - x - 20 = 0 ; b) 2x 2 - 11x - 6 = 0 ; g) x 2 - x - 56 = 0;<br />
d) 3z 2 - z - 4 = 0 ; e) 2t 2 + 9t + 7 = 0 ; v) 3z 2 -11z +10 = 0 .<br />
z) x 2 + 6x + 5 = 0 ; T) x 2 - 2x - 35 = 0 ; i) 3x 2 - 4x - 5 = 0;<br />
k) 3x 2 -10x + 9 = 0 ; l) 15x 2 - 34x +15 = 0; m) 3x 2 - 8x + 9 = 0 .<br />
n) 84 − 3y 2 − 9y = 0 ; o) 5x − 9 = 4x 2 ; p) 49 − 28x = −4x 2 .<br />
4 amoxseniT gantoleba:<br />
a) 0,2x 2 − 0,1x + 0,012 = 0; b) 0,5t 2 + 0,2t + 0,52 = 0;<br />
g) 2y 2 = 0,18 −1,6y; d) m 2 + 4 m− 2 = 0;<br />
e*) z 2 + 2( +1)z + 2 = 0; v*) 4( −1)t 2 − 6t + ( +1) = 0.<br />
33