(I) 2x²+×-10= (2×+5) (×-2)

(I)

2x² + x – 10 = (2x + 5) (x – 2)

Penyelesaian :

(2x + 5)(x – 2)
= 2x² – 4x + 5x – 10
= 2x² + x – 10✔

Maka, Pernyataan (I) benar✔

(II)

x² + x – 6 = (x – 5)(x + 2)

Penyelesaian :

(x – 5)(x + 2)
= x² + 2x – 5x – 10
= x² – 3x – 10✖

Maka, pernyataan (II) Salah✖

(III)

4x² – 9 = (4x + 3)(x – 3)

Penyelesaian :

(4x + 3)(x – 3)
= 4x² – 12x + 3x – 9
= 4x² – 9x – 9✖

Maka, pernyataan (III) Salah✖

(IV)

x² + 5x – 6 = (x + 6)(x – 1)

Penyelesaian :

(x + 6)(x – 1)
= x² – x + 6x – 6
= x² + 5x – 6✔

Maka, Pernyataan (IV) benar✔

Pernyataan yg benar adalah (I) dan (IV)