Question

Решите уравнение а)16-z²=0 б)x²-8x+16=0

Answer 1

А)
$16 - {z}^{2} = 0 \\ (4 - z)(4 + z) = 0 \\ 4 - z = 0 \\ - z = - 4 \\ z = 4 \\ 4 + z = 0 \\ z = - 4$
Ответ: -4;4


б)
${x}^{2} - 8x + 16 = 0 \\ d = 64 - 64 = 0 \\ x = \frac{8 + 0}{2} = 4$
Ответ: 4

Answer 2

16=z^2
z=+-4
б) D=64-64=0
x=8/2
x=4