Question

(x+3)(x-2)+3x =4(x+3/4)

Tìm x ai có thể giải chi tiết dùm mình a

Answer 1

(x+3)(x-2)+3x=4(x+3/4)

x(x+3)-2(x+3)+3x=4x+3

x²+3x-2x-6+3x-4x=3

x²+(3x-2x+3x-4x)-6=3

x²-6=3

x²=9

x²=3²

=>x=|3|

x=3 hoặc x=-3

Answer 2

\(\left(x+3\right)\left(x-2\right)+3x=4\left(x+\frac{3}{4}\right)\)

\(\Rightarrow x^2-2x+3x-6+3x=4x+3\)

\(\Rightarrow x^2+4x-6=4x+3\)

\(\Rightarrow x^2-6=3\)

\(\Rightarrow x^2=3+6=9\)

\(\Rightarrow x=-3\)hoặc \(x=3\)

Answer 3

(x+3)(x-2)+3x=4(x+3/4)

x(x+3)-2(x+3)+3x=4x+3