Question

Factor the trinomial x^2-x-20

Answer 1

(X-5)(X+4)=0
So...
X=5 or x=-5
Hope this was helpful :-)

Answer 2

*X^2 - x -20 (x - 5) (x + 4) x - 5 = 0 --------- x + 4 = 0 x = 5 -------- x = -4 ●●●●●●●●●●●●●●●● {3x + 6y = 9 {x - 6y = 11 3x + 6y = 9 x - 6y = 11 ------------------ 4x / / = 20 x = 20 / 4 x = 5 Replace 3x + 6y = 9 3 (5) + 6y = 9 15 + 6y = 9 6y = 9 - 15 6y = -6 y = -6/6 y = -1 Good luck :)