Объяснение:
1) y = x² +10
0 = x² +10
x ∉ R
2) y= 3 x²+2 x²-15x
0 = 3 x²+2 x²-15x
3 x²+2 x²-15x = 0
5 x²-15x = 0
5x × (x-3) = 0
x × (x-3) = 0
x = 0
x-3 = 0
x = 3
x₁ = 0, x₂ = 3
Объяснение:
1) y = x² +10
0 = x² +10
x ∉ R
2) y= 3 x²+2 x²-15x
0 = 3 x²+2 x²-15x
3 x²+2 x²-15x = 0
5 x²-15x = 0
5x × (x-3) = 0
x × (x-3) = 0
x = 0
x-3 = 0
x = 0
x = 3
x₁ = 0, x₂ = 3