exam Maths Puzzle Numerical Ability

14n^2+23n-15

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exam Other Question

What are the zero(s) for this equation:
4(x+6)^2-8=-4
a)x={-5}
b)x={-5,-7}
c)x={-5,0}
d)x={5,-7} what is the name of the equation: am = a1 + (m-1)d and its companion: Sm = (m/2) (2a+(m-1)d)

this equation is related to the 1+2+3+4+5...100 problem that a young German student