book Maths Puzzle Numerical Ability

place the following equations in the standard form of a quadratic equation (ax^2+bx+c=0)

a. 4/x^2+3/x-10=0

b. 6+4/x-1=5/x-3

c. 3.5x+4.6/x=1.2


please help

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book Other Question

(-x^2 - 3x) + (6x^2 - 3) Addition seems simple enough to me, but the minus/negative numbers confuse me on factoring.

x2 - 6x - 3 = 0