bài 4
0,1,2,3,4
bài 5 ko thấy đầu bài ( ko đủ)

\(N=\dfrac{-\left(2+\sqrt{3}\right)}{\left(2-\sqrt{3}\right)\left(2+\sqrt{3}\right)}+\sqrt{3}-1\)
\(N=-2-\sqrt{3}+\sqrt{3}-1=-3\)

=9³x5⁴

\(\left(2^2\right)^3=2^6=64\)
\(\left(100^0\right)^3=100^0=1\)
\(\left(5^5\right)^0-\left(8^0\right)^4=5^0-8^0=1-1=0\)

c)
=\(\sqrt{x}^3+\sqrt{y}^3=\left(\sqrt{x}+\sqrt{y}\right)\left(x-\sqrt{xy}+y\right)\)

7/45

\(M=\left(3\sqrt{2}+5\sqrt{2}-2\sqrt{2}\right):\sqrt{2}=6\sqrt{2}:\sqrt{2}=6\)

d)
2^x3-1=255
2^x3=256
2^x3=2⁸
x³=8
x=2

a)
\(2^{2x-5}=2^5\)
2x-5=5
2x=10
x=5
b)
\(4^{2x-1}=4^3\)
2x-1=3
2x=4
x=2
c)
\(\left(2x+2\right)^2=11^2\)
2x+2=11
2x=9
x=9/2
 

7/2