exam Maths Puzzle Numerical Ability

Could someone PLEASE graph these equations for me? Thank you!!
(a) 2
(b) 1/2
(c) -2
(d) -1/2

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exam Other Question

Please help me Multiply and simplify completely this problem. 5i*5i I cant figure out how to solve the problem X2 + 9x + 3 = 0.
I was told i need to use the quadratic formula though. Any help would be greatly appreciated.