Question

Giải phương trình:

3-4x(25-2x)=8x^2-x-300

Giúp mk vs ;-; 

Answer 1

bạn gõ công thức toán đi ! như này khó nhìn quá :((

Answer 2

Bài làm

3 - 4x( 25 - 2x ) = 8x² - x - 300

<=> 3 - 100x + 8x² - 8x² + x + 300 = 0

<=> 303 - 99x = 0

<=> 3( 101 - 33x ) = 0

<=> 101 - 33x = 0

<=> x = 101/33

Vậy x = 101/33

Answer 3

3-4x(25-2x)=8x²-x-300

<=>3-100x+8x²=8x²-x-300

<=>3-100x+8x²-8x²+x+300=0

<=>303-99x=0

<=>99x=303

<=>x=101/33

Vậy x=101/33

Answer 4

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

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

\(\Leftrightarrow99x=6\)

\(\Leftrightarrow x=\frac{2}{33}\)

Answer 5

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

\(3-100x+8x^2-8x^2+x+300=0\)

\(3-100x+x+300=0\)

\(-100x+x=0-3-300\)

\(-99x=-303\Leftrightarrow x=\frac{101}{33}\)

Answer 6

       3 - 4x( 25 - 2x ) = 8x² - x - 300

<=> 3 - 100x + 8x² - 8x² + x + 300 = 0

<=> 303 - 99x = 0

<=> 3( 101 - 33x ) = 0

<=> 101 - 33x = 0

<=> x = \(\frac{101}{33}\)

Vậy x = \(\frac{101}{33}\)

Answer 7

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

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

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

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

\(\Leftrightarrow-99x+3=-300\)

\(\Leftrightarrow-99x=-300-3\)

\(\Leftrightarrow-99x=-303\)

\(\Leftrightarrow x=\frac{303}{99}=\frac{101}{33}\)