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Mathematics 7 Online
OpenStudy (anonymous):

What are the x-intercept(s) of the graph of y + 20 = x2 - x?

OpenStudy (anonymous):

to find x-intercept make y=0 in the equation and solve for x

OpenStudy (nenadmatematika):

would you like some more explanations?

OpenStudy (anonymous):

Yes please!!

OpenStudy (nenadmatematika):

so plug in y=0 into your equation, and you get quadratic equation like this: 20=x^2-x...if you rearrange it a little bit you get x^2-x-20=0 so your task is to find the solutions for x...do you know how to solve the quadratic equation, it's basic?

OpenStudy (anonymous):

|dw:1340143333028:dw| like you see in the point where the line cross x axis the y coordinate is 0. That's why make y=0 in the equation to find corresponding x

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