exam Maths Puzzle Numerical Ability

What is the vertical stretch for the parabola with vertex (-1,3)and an x-intercept at (-2,0)?

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exam Other Question

Begin with ax^2 + bx + c = 0 and derive the quadratic formula by completing the square

then solve x = -2 - 3x^2 by using the quadratic formula what is the equation of a circle with center (-1, 2) and radius 4