elpr1nc1
elpr1nc1
14-04-2015
Mathematics
Answered
What is the solution of X2-9x+18=0
Answer :
Panoyin
Panoyin
14-04-2015
x² - 9x + 18 = 0
x =
-(-9) +/- √((-9)² - 4(1)(18))
2(1)
x =
9 +/- √(81 - 72)
2
x =
9 +/- √(9)
2
x =
9 +/- 3
2
x = 4.5
+
1.5
x = 4.5 + 1.5 x = 4.5 - 1.5
x = 6 x = 3
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