Question

Sendo a = 1, b = -7 e c = 10, o valor numérico de
x é:

Answer 1

b2 - 4.a.c

(-7)2 - 4.1.10

49-40

DELTA=9

(-b +- (Raiz de delta) / 2.a

(-(-7)+-(Raiz de 9) /2.1

(7 +- 3)/2

x1=(7+03)/2

x1=5

x2=(7-3)/2

x2=2

Answer 2

Delta: b² - 4.a.c
(-7)² - 4.1.10
49-40
9 —> a raiz quadrada de 9=3

x= 7+ ou - 3/ 2
x= 7+3/2 = 10/2 = 5

x= 7-3/2 = 4/2 = 2

S= {2;5}