Thursday, March 12, 2009

Question 8: Extend your Learning...

State the number of answers to the following equations.

a) 3x+2=17

b) x²-2x-3=0

c) x³-4x²+6x-7=0

Explain your answers.

2 comments:

  1. a) is 1 solution
    b) there are 2 solutions
    c) I think it is 3 solutions since when the highest power of x is 1 there is 1 solution, when it is 2 there are 2 solutions. So when the highest power is 3 there should be 3 solutions.

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  2. a)1 solution- x=5
    b)there are 2 solutions
    x=-1 or x=3
    c)i think there are three solutions, because the highest power of x is 3, hence there is 3 solutions.

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