Verified Answer :

ANCKPOP

*X^2 - x -20
(x - 5) (x + 4)
x - 5 = 0 --------- x + 4 = 0
x = 5 -------- x = -4

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{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 :)

asg12

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

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