Question

56.99X+7000000X*0.0000007X=0.0000000001

Answer 1

$56.99x+7000000x*0.0000007x=0.0000000001 \ 56.99x+4.9x^2-0.0000000001=0 \ 4.9x^2+56.99x-0.0000000001=0 \ D=3247.8601+4.9*4*0.0000000001=3247.8601 \ sqrt{D}=56.99 \ x_1= frac{-56.99+56.99}{2*4.9}=0 \ x_2= frac{-56.99-56.99}{9.8} = frac{-113.98}{9.8}=-11 frac{618}{980}=-11 frac{309}{454}$
ответ может подойти только второй так как x≠0

Answer 2

56.99X+7000000X*0.0000007X=0.0000000001
56.99X+7X*0,7X=0.0000000001
5699X+7X*70X=0,00000001
490 x^2+5699 x-0,00000001=0
d=5699^2+4*490*0,00000001= 32478601
x1= 1,75495E-12
x2= -11,63061224