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Flora M. for tutoring lessons in Commerce Township MI WyzAnt Tutoring Tutor Tutor United States

Flora M.

Occasional or regular math homework help

Commerce Township, MI (48382)

Travel Radius 10 miles
Hourly Fee $30.00
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Flora's Responses in WyzAnt Answers

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Factoring

solve the equation 3^2+4x-1=0

i think i have to use the x method to simpliy it 

+ more- less
Asked by Jackie from Moreno Valley, CA
00

Flora's Answer:

don't know if you have a typo, but first I solve it the way you wrote it and then I solve it considerting that in stead for ^2 you meant to write x^2:

3^2 + 4x -1 = 0

9 + 4X - 1 = 0    add 9 and -1

4x +8 = 0   add -8 on both sides

4x + 8 -8 = -8

4x +0 = -8

4x = -8  dived both sides by 4

4x/4 = -

x = -2

 

now solve:

3x^2 + 4x -1 = 0    use formula x1.2= (-b +/-  sqrt( b2- 4ac ) / 2a   ,   considering  x2 +bx +c = 0

x1,2 = ( -4 +/- sqrt(16 - 4*3*(-1) ) / 2*3

x1,2 = ( -4 +/- sqrt(28) ) / 6

x1,2 = ( -4 +/- 2sqrt7) /6

 

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