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Mathematics 30 Online
OpenStudy (anonymous):

Solve each equation: Please help

OpenStudy (anonymous):

Solve each equation. (x + 3)(x - 3) = 16 - 2x^2

OpenStudy (anonymous):

so try to expand the left side of the equation; can u do that?

OpenStudy (anonymous):

if you help me

OpenStudy (anonymous):

so to expand it x*x +(-3*x +3*x -3*3 => x^2-9 = 16-2x^2

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

sollect like terms x^2+2*x^2 = 16+9

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

3x^2 = 25

OpenStudy (anonymous):

x = + or - sqrt(25/3)

OpenStudy (anonymous):

ok is that it

OpenStudy (anonymous):

yup

OpenStudy (anonymous):

ok thank you

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