Question

решите уравнение ( 5х-3)2-(5х-1)*(5х+1)=28х+4

Answer 1

( 5х-3)^2-(5х-1)*(5х+1)=28х+4

25x^2-30x+9-(25x^2-1)=28x+4

25x^2-30x+9-25x^2+1=28x+4

-30x+10=28x+4

-30x-28x=4-10

-58x=-6

x=6/58

x=3/29