Question

a. (3*x^2 - 2^4)*2^3=2^8

b. |x-5"--2*(-3)=2^4

giúp kaka :(((

Answer 1

\(\left(3.x^2-2^4\right)2^3=2^8\\ \left(3.x^2-2^4\right)=2^8:2^3\\ \left(3.x^2-2^4\right)=2^5\\ 3.x^2-2^4=32\\ 3.x^2=32+2^4\\ 3.x^2=48\\ x^2=48:3\\ x^2=16\\ x=+-4\)

Answer 2

bn ghi lại đề câu b) nhé

Answer 3

lx-5l-2(-3)=2^4

lx-5l+6=16

lx-5l=16-6

lx-5l=10

\(\left[{}\begin{matrix}x-5=-10\\x-5=10\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=-10+5\\x=10+5\end{matrix}\right.\\ =>\left[{}\begin{matrix}x=-5\\x=15\end{matrix}\right.\)

Answer 4

giúp tớ với