Question

x^2+x-20=0

Answer 1

are we solving?

Answer 2

It factors to (x-5) (x+4) so the solutions are 5 and -4.

Answer 3

If so, what you could you could factor it into:
(x+5)(x-4), they multiply to -20 and add up to a positive 1

Answer 4

Given the equation x2 - x - 20 = 0, we see that it can likely be factored easily. Through simple trial and error we find that:

(x - 5)(x + 4) = 0.

From here, we set both terms equal to zero to find all possible solutions.

x - 5 = 0
x = 5

and

x + 4 = 0
x = -4.

Substituting 5 and -4 back into the original equation yield true results. Thus the solution set is x = -4, 5. More formal, the solution set is {-4, 5}.

Note: There are other methods of solving this problem such as the quadratic formula or by graphing the function.

Answer 5

understood?

Answer 6

that's x^2+x-20 alli :P

Answer 7

lol... :P

Answer 8

Haha, well your work can not go unrewarded

Answer 9

k bye hahhaha ;)

Answer 10

Thank you Miss Alli, I will catch you later