exam Maths Puzzle Numerical Ability

Solve the equation by completing the square

4x^2 + 16x + 7 = 0

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i just need assistance with one more question..than you so much

solve the follolwing system of inequalities by graphing
x-3y>6
3x+2y>12 let F(x)=(x^2)-2x+3. find the axis of symmetry, vertex, and the x and y intercepts if they exist. sketch the graph of f.