Question

Which equation has the same solution as x2 + 12x – 15 = 0?

Answer 1

(x+6)^2=51

Explanation:

Answer 2

x = 1.14 or x = -13.14

Explanation:

X² + 12x - 15 = 0

Using quadratic equation formula,

x = [-b ± √(b² - 4ac)] / 2a

a = 1, b = 12, c = -15

Substituting the respective values into the equation,

x = [-12 ± √(12² - (4*1*-15)] / 2 * 1

x = [-12 ± √(204)] / 2

x = (-12 ± 14.28) / 2

x = (-12 + 14.28) / 2 or x = (-12 - 14.28) / 2

x = 1.14 or x = -13.14