book Maths Puzzle Numerical Ability

Hi There!

I really need help understanding Factoring with a Zero Product. Could someone please explain this problem to me?

-2x^2 -2x + 24=0

Thanks to all

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book Other Question

Joe traveled against the wind in a small plane for 3 hr. The return trip with the wind took 2.8 hr. Find the speed of the wind if the speed of the plane in still air is 180mph. The Perimeter of a rectangle shaped lawn is 52 feet and the area is 144 square feet. What are the dimensions of the lawn?
isn’t it 12x12x12x12?
Thank you