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(a) This part of the question concerns the quadratic equation 4x 2 + 28x 49 = 0. (i) Find the discriminant of the quadratic expression

(a) This part of the question concerns the quadratic equation 4x 2 + 28x 49 = 0.

(i) Find the discriminant of the quadratic expression 4x 2 + 28x 49.

(ii) What does this tell you about the number of solutions of the equation? Explain your answer briefly.

(iii) What does this tell you about the graph of y = 4x 2 + 28x 49?

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