exam Maths Puzzle Numerical Ability

decide all values of b in the following equations that will
give one or more real number solutions.
(a) 3x^2 + bx - 3 = 0
(b) 5x^2 + bx + 1 = 0
(c) -3x^2 + bx - 3 = 0

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exam Other Question

The length of a rectangular playing field is 5ft less than twice its width. if the perimeter of theplaying field is 230 ft. find the length and width of the field. solving rational equations and expressions. I typed it down wrong

50 over t-2 - 16 over t = 30 over t

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