Answer:
X^2 +10x -6 = 0
a = 1 b = 10 c = -6
x = [-b +- sq root (b^2 - 4ac)] / 2a
x = [-10 +- sq root (100 -4*1*-6)] / 2 * 1
x = [-10 +- sq root (124)] / 2
x = -5 +- sq root (31)
Answer is the third answer down
Explanation:
3rd answer is correct
Let us use the completing square method to find the value of x.
x² + 10x = 6
x² + 10x + 25 = 6 + 25
( x + 5 ) ² = 31
x + 5 = ±√31
x = ±√31 - 5
Therefore, the 3rd answer is correct.
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