Question

Which of the following equations has - 1 as a root-
(a) x² + 3x – 10=0 (b) x² - x - 120
(c) 3x² – 2x - 5=0 (d) 9x² + 24x+16=0​

Answer 1

Answer:

equation 3x2 - 2x - 5 = 0

will have -1as root