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ENZHE62
@ENZHE62
August 2022
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Решить уравнение √x^2+6x+9=2
Спасибо (все это под корнем!)
равно 2
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ShirokovP
Verified answer
√(x^2 + 6x + 9) = 2
√ (x+ 3)^2 = 2
| x + 3| = 2
1)
x + 3 = 2
x = - 1
2)
x + 3 = - 2
x = - 5
3 votes
Thanks 4
Checov7400
Х²+6х+9=4 (х+3)²-2²=0 ((х+3)-2)((Х+3)+2)=0
Х+3-2=0 Х1=-1
х²+6х+9=0 Х+3+2=0 Х2=-5
х1+х2=-6
х1*х2=9 х1=х2=-3
(Х+3)(Х+3=(Х+3)² =0
(Х+3)²-4=0 (Х+3)²-2²=0 ОТВЕТ: Х1=-1 Х2=-5
2 votes
Thanks 1
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Answers & Comments
Verified answer
√(x^2 + 6x + 9) = 2√ (x+ 3)^2 = 2
| x + 3| = 2
1)
x + 3 = 2
x = - 1
2)
x + 3 = - 2
x = - 5
Х+3-2=0 Х1=-1
х²+6х+9=0 Х+3+2=0 Х2=-5
х1+х2=-6
х1*х2=9 х1=х2=-3
(Х+3)(Х+3=(Х+3)² =0
(Х+3)²-4=0 (Х+3)²-2²=0 ОТВЕТ: Х1=-1 Х2=-5