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Lillianna Stanley
Mathematics
13 April, 01:05
Solve g (-1) = x^2-5x+2
+5
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Young
13 April, 01:13
0
x = 5/2 + sqrt (17) / 2 or x = 5/2 - sqrt (17) / 2
Step-by-step explanation:
Solve for x:
x^2 - 5 x + 2 = 0
Subtract 2 from both sides:
x^2 - 5 x = - 2
Add 25/4 to both sides:
x^2 - 5 x + 25/4 = 17/4
Write the left hand side as a square:
(x - 5/2) ^2 = 17/4
Take the square root of both sides:
x - 5/2 = sqrt (17) / 2 or x - 5/2 = - sqrt (17) / 2
Add 5/2 to both sides:
x = 5/2 + sqrt (17) / 2 or x - 5/2 = - sqrt (17) / 2
Add 5/2 to both sides:
Answer: x = 5/2 + sqrt (17) / 2 or x = 5/2 - sqrt (17) / 2
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