\(\displaystyle 6.\, (x\, -\, 9)^2\, (x\, +\, 4)\, >\, 0\)
\(\displaystyle (x\, +\, 3)\, (x\, -\, 3)\, (x\, +\, 4)\, =\, 0\)
\(\displaystyle x\, =\, -3\)
\(\displaystyle x\, =\, 3\)
\(\displaystyle x\, =\, -4\)
While I do realize that this way of finding x intercepts is incorrect and that the two x values are 9 and -4 I still would like to know why is this way incorrect?
\(\displaystyle (x\, +\, 3)\, (x\, -\, 3)\, (x\, +\, 4)\, =\, 0\)
\(\displaystyle x\, =\, -3\)
\(\displaystyle x\, =\, 3\)
\(\displaystyle x\, =\, -4\)
While I do realize that this way of finding x intercepts is incorrect and that the two x values are 9 and -4 I still would like to know why is this way incorrect?
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