Question

X^2-16=0
a=+1 b=0 c=-16​

Answer 1

x^2-16

a=1;b=0;c=-16

delta=b^2-4ac

delta=0^2-4×1×(-16)

delta=64

x1,2=-b+/-raiz 64

2a

x1= 0+raiz64

2×1

x1=8

2

x1=4

x2=0-raiz64

2

x2=-8

2

x2=-4

x1=4 e x2= -4

Answer 2

Olá, tudo bem?

x² — 16 = 0

Sabe-se que a² — b² = (a+b)(a—b)

x² — 4² = 0

(x + 4)(x—4) = 0

x + 4 = 0 V x — 4 = 0

x' = — 4 V x" = 4

Sol: {—4; 4}

Espero ter ajudado!