Question

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Пожалуйста

Answer 1

$sqrt{5x+1}=2-2x, \ left { {{5x+1 geq 0,} atop {2-2x geq 0;}} right. left { {{xgeq-0,2,} atop {xleq1;}} right. -0,2 leq x leq 1;\ 5x+1=4-8x+4x^2, \ 4x^2-13x+3=0, \ D=169-48=121, \ x_{1,2}=frac{13pm11}{8}, \ x_1=0,25, x_2=3 textgreater 1, \ x=0,25.$