5m Zen
2x x2 9 )(
2x x2 9 )( pictures 5
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2x x2 9 )(
f x )u003d x2 2x 9
x2 14x 9 x2 2x 3
solve x2 2x 9 0
x2 2x 9 0
y 2x x2 9
2x x2 9 u2264 1 x 2
2x x2 9 3 x 3
2x x2 9
2x x2 9 )( x 1 )u003d 0
2x x2 9 1 x 2
