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Reagan Coleman
Mathematics
10 September, 03:43
Which of the following is a solution of x2 + 4x + 25?
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Ahmed Mosley
10 September, 04:02
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Solve for x:
x^2 + 4 x + 25 = 0 I ssume that's the notation.
Subtract 25 from both sides:
x^2 + 4 x = - 25
Add 4 to both sides:
x^2 + 4 x + 4 = - 21
Write the left hand side as a square:
(x + 2) ^2 = - 21
Take the square root of both sides:
x + 2 = i sqrt (21) or x + 2 = - i sqrt (21)
Subtract 2 from both sides:
x = i sqrt (21) - 2 or x + 2 = - i sqrt (21)
Subtract 2 from both sides:
Answer: x = i sqrt (21) - 2 or x = - i sqrt (21) - 2
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