tolong jawab besok mau di kumpul 2ײ+6×-20=0

pemfaktoran
(2x - 4)(x+5)=0
2x-4=0
x=2
x+5=0
x= - 5

2x^2 + 6x - 20 = 0
pq = 2 × (-20) = - 40
p + q = 6
p = 10
q = -4

2x^2 - 4x + 10x - 20 = 0
2x(x - 2) + 10(x - 2) = 0
(2x + 10) (x-2) = 0

2x + 10 = 0
2x = -10
x = -10/2
x = - 5
Atau
x - 2 = 0
x = 2

Semoga membantu^^