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Mathematics 7 Online
OpenStudy (anonymous):

(x-2)(x+7)=0

OpenStudy (anonymous):

solve the engation using zero product property. i dont know how to do this

OpenStudy (asnaseer):

the zero product property says that if the product of two numbers is zero, then either one of them must be zero.

OpenStudy (anonymous):

yea but it = 0 so then one the numbers wouldnt be 0

OpenStudy (asnaseer):

so, in your example, we have:\[(x-2)(x+7)=0\]which implies that either:\[x-2=0\]or:\[x+7=0\]

OpenStudy (anonymous):

but i dont have 0 as an option of my choices? im confused

OpenStudy (asnaseer):

you need to solve the two equations above, i.e.:\[x-2=0\]and:\[x+7=0\]

OpenStudy (anonymous):

but i dont get how to solve it?

OpenStudy (asnaseer):

if\[x-2=0\]then what must x equal?

OpenStudy (anonymous):

2?

OpenStudy (asnaseer):

correct, now try the same with:\[x+7=0\]

OpenStudy (anonymous):

be -7?

OpenStudy (asnaseer):

perfect! I hope you understand these now?

OpenStudy (anonymous):

so 2,-7?

OpenStudy (asnaseer):

yes :)

OpenStudy (anonymous):

slowly getting their

OpenStudy (asnaseer):

good to hear - remember we all started from where you are right now - just have patience...

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