exam Maths Puzzle Numerical Ability

how will you factor 2x^2-178x-14280=0
(2x ) (x ) << I cant find the factors

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exam Other Question

Hi. I'm having some trouble finding the vertex of this function. Can you help me?

y = 8x^2 + 5x What is the value of a for : 8^a(8(^a+1))(8(^a+2))/ 32^a =128 ??????