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21 August, 22:38

For which equation does it make the most sense to solve by completing the square?

x² + 20x = 52

5x² + 3x = 9

x 2 - 8=1

3 x 2 - x+17=0

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  1. 21 August, 23:00
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    The equation for which square method is possible is x²-8=1

    Step-by-step explanation:

    For checking which of the equation satisfies the complete square condition, we proceed by checking each of the available options

    1). x²+20x=52

    Rewriting it as x²+20x-52

    This binomial expression is not a perfect square since the product of the coefficient of x² (i. e. 1) and independent constant (i. e. 52) is not a perfect square.

    2). 5x² + 3x = 9

    This equation can be rearranged as 5x²+3x-9=0

    This binomial expression is not a perfect square since the product of the coefficient of x² (i. e. 5) and independent constant (i. e. 9) is not a perfect square.

    3.) x² - 8=1

    This equation can be rearranged as x²=9

    Hence x = ±3

    This binomial expression is a perfect square and can be done by the square method.

    4). 3x² - x+17=0

    This binomial expression is not a perfect square since the product of the coefficient of x² (i. e. 3) and independent constant (i. e. 17) is not a perfect square.
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