Find two integers whose sum is -1 and product is -42

Answer 1

x + y = -1 and x(y) =-42, solve for y in the first equation by subtracting x from both sides. Substitue

this for y in the second equation.

y = - x - 1

and, x (- x - 1) = -42

-x² - x + 42 = 0 multiply by -1

x ² + x - 42 = 0

(x+7)(x -6) = 0

x = - 7 or x = 6

y = 6 or y = - 7