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Loujoelou
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5.In the following equation, identify the xintercepts in the graph y = 3x^2 + 19x – 40.
I'm stuck on this problem can anyone help? :)
 2 years ago
 2 years ago
Loujoelou Group Title
5.In the following equation, identify the xintercepts in the graph y = 3x^2 + 19x – 40. I'm stuck on this problem can anyone help? :)
 2 years ago
 2 years ago

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mathslover Group TitleBest ResponseYou've already chosen the best response.3
You mean to say that we have to find x intercept?
 2 years ago

waterineyes Group TitleBest ResponseYou've already chosen the best response.1
Where are you having problem??
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.3
Ok so just put y =0 : \[\large{0=3x^2+19x40}\] \[\large{0=3x^2+24x5x40}\] \[\large{0=3x(x+8)5(x+8)}\] \[\large{0=(3x5)(x+8)}\]
 2 years ago

waterineyes Group TitleBest ResponseYou've already chosen the best response.1
For finding x intercept we put y = 0..
 2 years ago

Loujoelou Group TitleBest ResponseYou've already chosen the best response.0
Oh okay, sry I forgot about that and yeah had trouble factoring it and now I see. This means our x= 8 and 5/3
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.3
3x5=0 x+8=0 3x=5 x=8 x=5/3
 2 years ago

rymdenbarn Group TitleBest ResponseYou've already chosen the best response.0
Right, I'd also like to add that in case you forget whether to make the y or the x zero when it comes to either intercept remember that any xintercept would have to be (x, 0) and that any yintercept would have to be (0, y). Cheers
 2 years ago

Loujoelou Group TitleBest ResponseYou've already chosen the best response.0
K thx a ton :)
 2 years ago
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