exam
Maths Puzzle
Numerical Ability
Use the quadratic formula to solve the equation for (a) x in terms of y and (b)y in terms of x.
1)4x^2-4sy+1-y^2=0
2)2x^2-xy=3y^2+1
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exam Other Question
can you help with this LONG problem showing steps would really help
a)
(x^2-2x-15/x^2-x-6)/x^2-5x/x^2-4
b)
6/x-1 minus x+2/x
c)
(x+3)^2-2(x+1)
d)
1/x+1/y divide x- 1/1/xy
i dont know where this question should be posted Q. A certain isotope has a decay rate of-1.5% find its half life
thank you