exam Maths Puzzle Numerical Ability

find domain and range

f(x)=2-square root xsquared+3x+2divided by x squared+5x+4

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exam Other Question

Use a linear combination to solve the system.

5x + y = 6
-5x + 3y = -22 Simplify. Write your answer with positive exponents only.

(b^2)^-6/b^-4

Please help me with this problem.
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