Book Maths Puzzle Quadratic Equations

How do you find A and B in the equation 12 x^2 = 48 when directed to \"Solve by using the Quadratic Equation.\"?

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Book Other Question

What are the roots if in ractored form it is y=(2x-3)(3x+4)? what is the axis of symmetry? How do you graph this....
y= -7x + 14