Question

5 . 2² + ( x + 3) = 5²

Answer 1

\(5.4+\left(x+3\right)=25\)

\(20+\left(x+3\right)=25\)

\(\left(x+3\right)=5\)

\(x=5-3=2\)

Answer 2

\(5.2^2+\left(x+3\right)=5^2\)

\(10^2+\left(x+3\right)=25\)

              \(\left(x+3\right)=25-100\)

               \(\left(x+3\right)=75\)

                \(x=72\)

Answer 3

\(5.2^2+\left(x+3\right)=5^2\)

\(\Leftrightarrow5.4+\left(x+3\right)=25\)

\(\Leftrightarrow20+\left(x+3\right)=25\)

\(\Leftrightarrow\left(x+3\right)=5\)

\(\Leftrightarrow x=5-3=2\)

Answer 4

5 x 2² + ( x + 3 ) =  5²

<=> 5 x 4 + ( x + 3 ) = 25

<=> 20 + ( x + 3 ) = 25

x + 3 = 25 - 20

x + 3 = 5

x = 5 - 3

x = 2

nha bn