Câu trả lời:

200+900+400

=1100+400

=1500

ai tk mk mk tk lại

\(pt\Leftrightarrow2\left(x+4\right)-2\sqrt{1+16x}+x^2-3x-10=0\)

\(\Leftrightarrow\frac{2\left(x^2+8x+16-1-16x\right)}{x+4+\sqrt{1+16x}}+\left(x-5\right)\left(x+2\right)\)

\(\Leftrightarrow\frac{2\left(x^2-8x+15\right)}{x+4+\sqrt{1+16x}}+\left(x-5\right)\left(x+2\right)=0\)

\(\Leftrightarrow\frac{2\left(x-5\right)\left(x-3\right)}{x+4+\sqrt{1+16x}}+\left(x-5\right)\left(x+2\right)=0\)

\(\Leftrightarrow\left(x-5\right)\left(\frac{2x-6}{x+4+\sqrt{1+16x}}+x+2\right)=0\)

Biết phải lm j tiếp theo r` chứ ?

x + 12 = 13 + 10

x + 12 = 23

x         = 23 - 12 

x         = 11

k cho tui