Question

X^2-3x+lg(x+1)=lg(x+1)+10

Answer 1

${x}^{2} - 3x + log_{10}(x + 1) = log_{10}(x + 1) + 10 \\ x + 1 > 0 \\ x > - 1 \\ {x}^{2} - 3x - 10 = 0 \\ x = 5 \\ x = - 2(не подходит )$
Ответ:х=5