Math

x^2 -18x + 81 = 0 solve by factoring

Asked by AnneS2 on 01 Apr 05:05

Last updated by anonymous on 03 Apr 18:10

1 Answers

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Answered by CherieS on 03 Apr 18:10

x^2 -18x + 81 = 0

(x )(x ) ( -9)( -9)

(x-9)(x-9)=(x-9)^2

Check:

(x-9)(x-9)

(x)(x) (x)(-9) (-9)(x) (-9)(-9)

x^2 -9x -9x +81

x^2 =18x +81

Simplify:

x-9=0

Solve:

x-9=0

x-9+9=0+9

x=9