Question

Solve for x. Use the quadratic formula to solve for X. X^2+10x=6

Answer 1

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:

Answer 2

3rd answer is correct

Explanation:

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.