exam Maths Puzzle Numerical Ability

Use the quadratic formula to solve the equation.

3x^2 - 4x - 7 = 0

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exam Other Question

Geometry. If the sides of a square are decreased by 2cmm the area is
decreased by 36cm^2. What were the dimensions of the original square?'.
solve using the quadratic formula. show work for credit.

Please help me solve.

4x^2 =4x + 10