Question

if 2 and 7 was parts of the equivalence X²+AX+B=0 then A+B =​

Answer 1

Răspuns:

5

Explicație pas cu pas:

x1=2

x2=7

Viete ⇒

S=x1+x2= -A = 9

A = -9

P=x1x2 = B

B = 2x7 = 14

A + B = -9 + 14 = 5.