Mathematics
bouchie101
5

How can I solve x^2-9x+9=0

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(2) Answers
nikolak

You either have to use the quadratic equation or factor it to find the roots of the function. x² - 9x + 9 = 0 x = -(-9) ± √(-9)² - 4(1)(9)                    2(1) x = 9 ± √81 - 36               2 x = 9 ± √45           2 x = 9 ± 3√5          2 x = 4.5 ± 1.5√5

jacksoncelestin

You have to factor. So what multiplies to equal 9 and adds to equal -9? Nothing, so you have to do the quadratic formula setting x to equal that equation. You will have two solutions since the formula is an x squared. 

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