book Maths Puzzle Numerical Ability

I need help on the quadratic equation: 2x(to the 2square)-7x+5=0? How do you solve it?

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book Other Question

With the major options package and destination charge, a sports car cost $24,416. The base price of the car was ten times the price of thr major options package and fifty times the destination charge. What was the base price of the car? Graph equation; Let X=-3, -2, -1, 0, 1, 2,and 3.
20) y=-1/2x + 2