Hi, I need help with my math questions, I don't understand it, it would be very helpful if someone helps me.

I need help urgent.

1. Solve each of the following equations using the most efficient method. Show your work for full marks. Round to 2 decimal places if needed. (3, 3 marks) a) 2x2 - 5x + 8 = 9 b) 5(x + 3)2 - 80 = 02. Find the vertex and the axis of symmetry of y = -2x2 + 6x + 3 by completing the square. Answers should be exact (no rounding). (4 marks)3. For the following quadratics relation, y = 4x + x - 7, state how many x-intercepts (over the Real number set) exist. Do NOT solve the equation! Explain your reasoning