Для того, чтобы найти нули функции, нужно приравнять функцию к нулю и решить уравнение.
1) \(y = 4x - 8\)
\(4x - 8 = 0\)
\(4x = 8\)
\(x = \frac{8}{4}\)
\(x = 2\)
2) \(y = -3x + 9\)
\(-3x + 9 = 0\)
\(-3x = -9\)
\(x = \frac{-9}{-3}\)
\(x = 3\)
3) \(y = 3(x - 2) + 9\)
\(3(x - 2) + 9 = 0\)
\(3x - 6 + 9 = 0\)
\(3x + 3 = 0\)
\(3x = -3\)
\(x = \frac{-3}{3}\)
\(x = -1\)
4) \(y = -2(x + 3) + 8\)
\(-2(x + 3) + 8 = 0\)
\(-2x - 6 + 8 = 0\)
\(-2x + 2 = 0\)
\(-2x = -2\)
\(x = \frac{-2}{-2}\)
\(x = 1\)
Ответы:
1) \(x = 2\)
2) \(x = 3\)
3) \(x = -1\)
4) \(x = 1\)