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neverforgetvivistee
 4 years ago
How do i find the excluded value of this denominator?
r^3−r^2−49r+49
neverforgetvivistee
 4 years ago
How do i find the excluded value of this denominator? r^3−r^2−49r+49

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Kira_Yamato
 4 years ago
Best ResponseYou've already chosen the best response.2Let the denominator = 0

neverforgetvivistee
 4 years ago
Best ResponseYou've already chosen the best response.0i learned that we factor it first and equal it to zero

neverforgetvivistee
 4 years ago
Best ResponseYou've already chosen the best response.0how do i solve it? it doesn't have a common factor

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0try finding a factor using factor theorem

neverforgetvivistee
 4 years ago
Best ResponseYou've already chosen the best response.0thanks i'll learn that go learn that i haven't learned that yet

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0x7 is worth trying (as last term = 7^) f(7) = 343  49  343 + 49 = 0 ok so (x7) is a factor now find any other factors by dividing by x7

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0factor theorem if f(x) is divisible by xa then f(a) = 0

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0r^2 +6r  7  r7 ) r^3−r^2 −49r+49 r^3 7r^2  6r^2  49r 6r^2  42r  7r + 49

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0r^2 +6r  7 = (r+7)(r1) so factors of f(r) = (r7)(r+7)(r1)

cwrw238
 4 years ago
Best ResponseYou've already chosen the best response.0so excluded value is value of f(r) when r=7,7 or 1
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