Question

(x+5)³=-64

(2x-3)²=9

Answer 1

\(\left(x+5\right)^3=4^3\\ x+5=4\\ x=-1\)

 

\(\left(2x-3\right)^2=3^2\\ 2x-3=3\\ 2x=0\\ x=0\)

Answer 2

`(x + 5)^3 = -64`

`=> (x + 5)^3 = -4^3`

`=> x + 5   = -4`

`=> x         = -4 - 5`

`=> x         = -9`

_________________________

`(2x - 3)^2 = 9`

`=>` \(\left[{}\begin{matrix}\left(2x-3\right)^2=3^2\\\left(2x-3\right)^2=-3^2\end{matrix}\right.\)

`=>`\(\left[{}\begin{matrix}2x-3=3\\2x-3=-3\end{matrix}\right.\)

`=>` \(\left[{}\begin{matrix}2x=6\\2x=0\end{matrix}\right.\)

`=>`\(\left[{}\begin{matrix}x=3\\x=0\end{matrix}\right.\)

Answer 3

`(x+5)^3 = -64`

`(x+5)^3 = (-4)^3`

`x + 5 = -4`

`x = -4 - 5`

`x=-9`

 

`(2x-3)^2 = 9`

`(2x-3)^2 = 3^2`

`2x-3=3`

`2x = 6`

`x=6:2`

`x=3`