Question

3 - 4x( 25 - 2x) = 8x² + x - 300

Answer 1

\(3-4x\left(25-2x\right)=8x^2+x-300.\)

\(3-100x+8x^2=8x^2+x-300\)

\(3-100x=x-300\)

\(3+300=x+100x\)

\(303=101x\)

\(x=3\)

Vậy x cần tìm bằng 3

Answer 2

3-4x(25-2x)=8x^2 + x -300 
<=> 3-100x+8x^2=8x^2 + x -300 
<=>3-100x=x-300 
<=>101x=303 
<=>x=3 

Answer 3

\(3-4x\left(25-2x\right)=8x^2+x-300\)

\(\Leftrightarrow3-100x+8x^2=8x^2+x-300\)\(\Leftrightarrow8x^2-8x^2-100x-x=-3-300\)

\(\Leftrightarrow-101x=-303\)

\(\Leftrightarrow x=3\)