Question

ДАЮ 100 БАЛЛОВ. Делать нужно с решением!

Answer 1

1) 2x² - 5x - 1 = 0

2) - 9x² = 0

x² = 0

x =0

3) 18x - 3x² = 0 | : 3

6x - x² = 0

x² - 6x = 0

x(x - 6) = 0

x₁ = 0

x - 6 = 0    ⇒   x₂ = 6

$4)x^{2} -10x+16=0\\\\D=(-10)^{2} -4*16=100-64=36=6^{2}\\\\x_{1}=\frac{10-6}{2}=2\\\\x_{2}=\frac{10+6}{2}=8 \\\\\boxed{2 \ ; \ 8}\\\\\\5)x^{2} -7x+1=0\\\\x_{1}+x_{2}=7-teorema \ Vieta\\\\\boxed{7}$