exam Maths Puzzle Numerical Ability

a) y^2-11y+28
b) 4x^2-11x+6

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exam Other Question

How do you solve 3log base 7 + 2log base 8? As of right now I have switched to log base 7 x^3 + log base 8 x^2. Then I changed that to (log x^3/log 7) + (log x^2/log 8)
After that 2x(SQUARED)=X+30