Book Maths Puzzle Algebra

How do you solve this problem? 25y^2-49w^2

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What are the openings and axis points of these: 1)y=x(squared)+2x+3 2)y=2x(squared)+4+1 3)y=4x(squared)-8x+7 4)y=x(squared)-6x+5 5(y=-6x(squared)+2x+3 How do you solve the problem x^2+14x+24