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Question #1404
x[sup]2[/sup] - 6 = 3x + 9
Expert's answer
x
2
- 6= 3x+9
x
2
- 3x - 15= 0
D = 9 + 60 = 69
x
1
= (3 + √69)/2 = 5.65
x
2
= (3 - √69)/2 =-2.65
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