Question

Tìm x     ( 2^2 + 3 ) ( x - 5 ) + 14 = 5^2 + 124 : 2^2

Answer 1

(2²+3).(x-5)+14=5²+124:2²

(4+3).(x-5)+14=25+124:4

7.(x-5)+14=25+31

7.(x-5)+14=56

7.(x-5)=42

x-5=6

x=11

Answer 2

Ta có: \(\left(2^2+3\right)\left(x-5\right)+14=5^2+124:2^2\)

\(\Leftrightarrow7\left(x-5\right)=25+31-14=42\)

\(\Leftrightarrow\left(x-5\right)=6\)

hay \(x=11\)