What two numbers multiple to get -12 and add to -5

Original question: What two numbers multiply to get -12 and add to -5.

Pairs of numbers (1.772, -6.772) and (-6.772, 1.772).

Step-by-step explanation:

Let and be the two numbers, the we know that

(1).

and

(2).

We solve for in equation(2) and substitute this into equation(1)

This is a quadratic equation, and its solutions are

we substitute these two solutions into equation(1) and find the corresponding values:

Thus we have two pairs of numbers which multiply to give -12 and add to give -5

and

answer: options?

step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)