Jawaban:

1. x = 5 V x = -2

2. x = -1 ½ V x = 7

Penjelasan dengan langkah-langkah:

1.)

x²-3x-10 = 0

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

x = 5 V x = -2

2.)

2x²-11x-21 = 0

(2x+3)(x-7)=0

x = -1 ½ V x = 7