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Julio Bird
Mathematics
16 April, 15:01
What is x² - 30x+81=0
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Mcclure
16 April, 15:28
0
X² - 30x + 81 = 0
x = - (-30) + / - √ ((-30) ² - 4 (1) (81))
2 (1)
x = 30 + / - √ (900 - 324)
2
x = 30 + / - √ (576)
2
x = 30 + / - 24
2
x = 15 + 12
x = 15 + 12 x = 15 - 12
x = 27 x = 3
The solution to the problem is {27, 3}.
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