exam Maths Puzzle Numerical Ability

Find the slope of any line parallel to the line through points (19, 7) and (4, 8).

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exam Other Question

what is a way to do polynomial equations to learn it faster and eiser
and a way that i will learn so i could do my work and homework can you teach a technique
I need help with 3x^2 - 2x + 1 = 0

I came out with x = 2/6 + sqrt 8/6

Did I do this right?

I see the answer, but am confused on what the "i" means?