Question

1.H 20 - Qual o resultado de: (x - 5)2 = 1.
a) (R: 3,7)
b) (R: 2,7)
c) (R: 3,9)
d) (R: 5,10)
e) (R: 4,9)​

Answer 1

(x-5)²= 1

(x-5)= √1

(x-5)= ±1

=> x-5 = +1==> x=1+5=6 ✓

=> x-5 = -1==> x=-1+5=4 ✓ => (R: 4, 6) ✓