8 x² = 42x+221 berapah jawaban beserta caranya

8x^2= 42x +221
8x^2-42x -221 =0

x1.2 = -b plus minus \/ b^2-4ac /2a
= 42 plus minus\/42^2-4.8.-221 /16
=42 plus minus \/ 8836/16
=42 plusminus 94/16

x1= 42+94/16=8,5

x2=42-94/16=-3,25

semoga membantu
maaf jika keliru