Question

( 2.x-5)\(^5\) -64=960

GIÚP MÌNH VỚI GẤP!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

Answer 1

\(\left(2x-5\right)^5-64=960\)

\(\Rightarrow\left(2x-5\right)^5=960+64\)

\(\Rightarrow\left(2x-5\right)^5=1024\)

\(\Rightarrow\left(2x-5\right)^5=4^5\)

\(\Rightarrow2x-5=4\)

\(\Rightarrow2x=9\)

\(\Rightarrow x=\dfrac{9}{2}\)

Answer 2

\(\left(2\cdot x-5\right)^5-64=960\\ \left(2x-5\right)^5=1024\\ \left(2x-5\right)^5=4^5\\ 2x-5=4\\ 2x=9\\ x=\dfrac{9}{2}\)

Answer 3

\(\left(2x-5\right)^5=960+64\)

\(\left(2x-5\right)^5=1024\)

\(\left(2x-5\right)^5=4^5\)

\(2x=9\Rightarrow x=4,5\)

Answer 4

    (2.x-5)⁵-64=960

⇒ (2.x-5)⁵=960+64=1024

⇒ (2.x-5)⁵=4⁵

⇒ 2.x-5=4

⇒ 2.x=4+5=9

⇒ x=9:2

⇒ x=4,5

Answer 5

\(\left(2x-5\right)^5-64=960\)

\(\left(2x-5\right)^5=960+64\)

\(\left(2x-5\right)^5=1024\)

\(\left(2x-5\right)^5=2^{10}\)

\(\left(2x-5\right)^5=2^{2.5}\)

\(\left(2x-5\right)^5=4^5\)

\(\Rightarrow2x-5=4\)

\(2x=4+5\)

\(2x=9\)

\(x=9:2\)

\(\Rightarrow x=4,5\)