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https://math.answers.com/math-and-arithmetic/9x_squared_plus_4x_-5_equals_0

9x squared plus 4x -5 equals 0? - Answers

X is equal to -1, her's my working out:add 5 to both sides= 9x2+4x=5-4x from both sides= 9x2=5-4xsquare root both sides, then re-square (this may be incorrect) to get 9x=5-4xadd 4x to both sides= 9x=4x=5use trial and error to guess x =-1Substitute -1 into your original equation (be careful with minus signs etc) and you'll find -1 is correct.



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9x squared plus 4x -5 equals 0? - Answers

https://math.answers.com/math-and-arithmetic/9x_squared_plus_4x_-5_equals_0

X is equal to -1, her's my working out:add 5 to both sides= 9x2+4x=5-4x from both sides= 9x2=5-4xsquare root both sides, then re-square (this may be incorrect) to get 9x=5-4xadd 4x to both sides= 9x=4x=5use trial and error to guess x =-1Substitute -1 into your original equation (be careful with minus signs etc) and you'll find -1 is correct.



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https://math.answers.com/math-and-arithmetic/9x_squared_plus_4x_-5_equals_0

9x squared plus 4x -5 equals 0? - Answers

X is equal to -1, her's my working out:add 5 to both sides= 9x2+4x=5-4x from both sides= 9x2=5-4xsquare root both sides, then re-square (this may be incorrect) to get 9x=5-4xadd 4x to both sides= 9x=4x=5use trial and error to guess x =-1Substitute -1 into your original equation (be careful with minus signs etc) and you'll find -1 is correct.

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      X is equal to -1, her's my working out:add 5 to both sides= 9x2+4x=5-4x from both sides= 9x2=5-4xsquare root both sides, then re-square (this may be incorrect) to get 9x=5-4xadd 4x to both sides= 9x=4x=5use trial and error to guess x =-1Substitute -1 into your original equation (be careful with minus signs etc) and you'll find -1 is correct.

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