exam Maths Puzzle Numerical Ability

Solve:
a) (4^x)(2^(x+3))=16^(2x-5)
b) (2x-1)^(1/2)=sqrt3
c) 8^(2x)+8^(x)=0
d)(x+3)^(2/3)=4

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exam Other Question

The ratio of two polynomials is called a:

a. polynomial
b. fraction
c. rational expression
d. function
Solve using the quadratic formula please:



Please help me with step by step instructions to help me understand.
Thank you in advance!
C