Question

Ai giải hộ mình với ạ<3

a) 3x+2.(5-x)=-11

b) 3x^2 - 3x(x-2)= 36

 

Answer 1

a) \(3x+2\left(5-x\right)=-11\)

\(\Leftrightarrow3x+10-2x=-11\)

\(\Leftrightarrow x=-21\)

b) \(3x^2-3x\left(x-2\right)=36\)

\(\Leftrightarrow3x^2-3x^2+6x=36\)

\(\Rightarrow x=6\)

Answer 2

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Answer 3

3x + 2( 5 - x ) = -11

<=> 3x + 10 - 2x = -11

<=> x + 10 = -11

<=> x = -21

3x² - 3x( x - 2 ) = 36

<=> 3x² - 3x² + 6x = 36

<=> 6x = 36

<=> x = 6

Answer 4

a) 

\(3x+10-2x=-11\) 

\(x+10=-11\) 

\(x=-21\) 

b) 

\(3x^2-3x\left(x-2\right)=36\) 

\(3x^2-3x^2+6x=36\) 

\(6x=36\) 

\(x=6\)

Answer 5

                 Bài làm :

 \(\text{a)}3x+2\left(5-x\right)=-11\)

\(\Leftrightarrow3x+10-2x=-11\)

\(\Leftrightarrow x+10=-11\)

\(\Leftrightarrow x=-21\)

 \(\text{b)}3x^2-3x\left(x-2\right)=36\)

\(\Leftrightarrow3x^2-3x^2+6x=36\)

\(\Leftrightarrow6x=36\)

\(\Leftrightarrow x=6\)