Question

2x²-7x= -3
x1 sama x2 nya berapa kak? sama caranya yaa

Answer 1

2x^2 - 7x + 3 = 0

2x^2 - 6x - x +3 = 0

(2x-1)(x-3)=0

:. jadi x = 1/2 atau 3

Answer 2

2x²-7x=-3
2x²-7x+3

--- ... +... = -7
--- ... x... = (2.3) = 6
⇒  -1 + (-6) = -7
⇒  -1 x (-6) = 6

2x²-6x-x+3
(2x²-6x) dan (-x+3)
2x(x-3) dan -1(x-3)
2x-1 dan x-3

x1 --- 2x-1 ⇒ 2x = 1
------------   ⇒ x = 1/2

x2 --- x-3   ⇒ x = 3