exam Maths Puzzle Numerical Ability

(h^4-h^2+1)+(-5n^3-n^2+9)
adding &substracting polynomials

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exam Other Question

solve

log base is 3.4 ans is 5 and exponent is 2x-1
The sum of two numbers is 16. Twice the smaller # is 2 more than the larger #.
Find them. ??Can someone please help me.