Question

номер 4***************

Answer 1

X + 4 = 5 / ( 2X - 1 )
5 = ( X + 4)*( 2X - 1 )
5 = 2X^2 - X + 8X - 4 
2X^2 + 7X - 9 = 0 
D = 49 + 72 = 121 
√ D = 11 
X1 = ( - 7 + 11 ) : 4 = 1 
X2 = ( - 7 - 11 ) : 4 = - 4,5

Answer 2

$x+4= frac{5}{2x-1} /*(2x-1) neq 0 \ 2x-1 neq 0 \ 2x neq 1 \ x neq 0.5 \ \ (x+4)(2x-1)=5 \ x^{2} -x+8x-4-5=0 \ 2x^{2} +7x-9=0 \ D=49+72=121 \ sqrt{D} =11 \ x_{1} = frac{-7-11}{4} = frac{-18}{4} =-4.5\ x_{2} = frac{-7+11}{4} = frac{4}{4} =1$