X²+4x-3= 4²+8x+3= X²-3x+2= Berapa y kak

Bagian pertama
Ralat → x² + 4x + 3 bukan x² + 4x - 3

= x² + 4x + 3
= x² + 3x + x + 3
= x(x + 3) + (x + 3)
= (x + 1)(x + 3)

Bagian kedua
= 4x² + 8x + 3
a = 4
b = 8
c = 3

X1,2
= -b ± √(b² - 4ac) / 2a
= -8 ± √(8² - 4.4.3) / 2.4
= -8 ± √64 - 48) / 8
= -8 ± √16 / 8
= -8 ± 4 / 8

X1 = (-8 + 4) / 8
X1 = -4 / 8
X1 = - ½ → (2x + 1)

X2 = (-8 - 4) / 8
X2 = -12 / 8
X2 = - 3/2 → (2x + 3)

= 4x² + 8x + 3
= (2x + 1)(2x + 3)

Nomor terakhir
= x² - 3x + 2
= x² - 2x - x + 2
= x(x - 2) - (x - 2)
= (x - 1)(x - 2)

Semoga berguna +_+