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March 26, 2017

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Could someone please show me ALL the steps to do the following:

Equation: 2x^2 = 11

Answer: Square root of 22 over 2, Negative square root of 22 over 2; 2.35, -2.35


Equation: 3m^2 - 4m = -2

Answer: 2 +/- i (imaginary sign) square root of 2 over 3

  • Math 12 - Review - Quadratic - ,

    The first:
    x2</sup?=11/2
    x= sqrt (11/2) which is an ok answer. Some purists don't like sqare roots of fractions, so ...
    x= sqrt [(11/2)(2/2)]
    x= sqrt (22/4)= 1/2 sqrt 22

    On the last, change it to a quadratic..
    3m2 -4m + 2=0

    then the quadratic equation
    x= (4 +- sqrt (16-24))/6

    x= 2/3 +- [sqrt (-8)]/6

    x= 2/3 +- sqrt (-8/36)
    then reduce that (the second part reduces to sqrt (-2/9) or 1/3 sqrt -2

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