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nosnip
 one year ago
how to factorise and solve x^2  8
nosnip
 one year ago
how to factorise and solve x^2  8

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.08 isn't a perfect square, so that can't be factored without using radicals. As for solving it, is that equal to something?

nosnip
 one year ago
Best ResponseYou've already chosen the best response.0that's what I thought but I've got to draw it as a graph

nosnip
 one year ago
Best ResponseYou've already chosen the best response.0there's y= (x2)(x+2)(x+2) and y= x^2 8

nosnip
 one year ago
Best ResponseYou've already chosen the best response.0I've only got to sketch it but I need the x intercept I think

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so you need to sketch both of those and find the solution/intersection point?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok. for the first one you can use the xintercepts. The second one, doesn't have xintercepts. You can draw it using transformations. Reflect the parabola over the xaxis and shift it down 8.dw:1443290058687:dw

nosnip
 one year ago
Best ResponseYou've already chosen the best response.0Ooh I see yes that's clever!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0:) You can solve this algebraically as well \((x2)(x+2)(x+2)=x^28\) \((x^24)(x+2)=x^28\) \(x^3+2x^24x8=x^28\) \(x^3+3x^24x=0\)

nosnip
 one year ago
Best ResponseYou've already chosen the best response.0Okay thankyo uvery much
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