7x^2+12x+3

Question

use the quadratic formula

Answer 1

7x² + 12x + 3 = ax² + bx + c

so, a = 7, b = 12, c = 3

quadratic equation is:  ( -b ± √(b² - 4ac))/2a

so we plug in the values:

(-12 ± √(144 - 4*7*3))/2*7

(-12 ± √(144 - 84))/ 14

(-12 ± √(60))/14

(-12 ± 2√15)/14

x = (-6 ± √15)/7