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Mathematics 8 Online
OpenStudy (darkbluechocobo):

Find the zeros of the function f(x) = x2- 5x - 6 by factoring. What is the largest zero of the function? Enter a number only.

OpenStudy (austinl):

We will have, \((x+\underline{~~~})(x-\underline{~~~})\) What when multiplied is -6, and when added is -5?

OpenStudy (darkbluechocobo):

-3 x 2 and -3-2

OpenStudy (austinl):

Nope, try a different set.

OpenStudy (darkbluechocobo):

1 x -6 and 1 - 6

OpenStudy (austinl):

Indeed, now where would they go in the set above?

OpenStudy (darkbluechocobo):

did you mean when added or when multiplied though? Because that is an addition sign for the first one

OpenStudy (austinl):

Indeed, plug them in and FOIL it out and see what goes where :)

OpenStudy (darkbluechocobo):

uhm I am confused at this step plug the 6's in for x?

OpenStudy (austinl):

No, not for x, the blanks.

OpenStudy (darkbluechocobo):

x + 6 x - -6?

OpenStudy (darkbluechocobo):

x + -6*

OpenStudy (austinl):

(x+1)(x-6) Try that, foil it out.

OpenStudy (darkbluechocobo):

x^2+x -6x -6

OpenStudy (austinl):

which simplifies to?

OpenStudy (darkbluechocobo):

x^2 + -5x -6

OpenStudy (darkbluechocobo):

how would you find the answer

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