To find the other root of the quadratic equation 20x^2 + 31x + 12 = 0 knowing that x1 = -4/5, we can use the factored form of the quadratic equation:
20x^2 + 31x + 12 = 0(5x + 4)(4x + 3) = 0
Setting each factor to zero to find the roots:
5x + 4 = 05x = -4x = -4/5
4x + 3 = 04x = -3x = -3/4
Therefore, the two roots of the quadratic equation are x1 = -4/5 and x2 = -3/4.
To find the other root of the quadratic equation 20x^2 + 31x + 12 = 0 knowing that x1 = -4/5, we can use the factored form of the quadratic equation:
20x^2 + 31x + 12 = 0
(5x + 4)(4x + 3) = 0
Setting each factor to zero to find the roots:
5x + 4 = 0
5x = -4
x = -4/5
4x + 3 = 0
4x = -3
x = -3/4
Therefore, the two roots of the quadratic equation are x1 = -4/5 and x2 = -3/4.