Gdz Po Algebre Iu.n. Makarychev, N.g Mindiuk.k.i. Neshkov, S.b Suvorova -

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x−32the fraction with numerator x minus 3 and denominator 2 end-fraction . Grade 9: Quadratic Functions Find the coordinates of the vertex of the parabola Identify coefficients. For the quadratic Calculate the x-coordinate ( ). Use the formula

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xv=−-42⋅1=42=2x sub v equals negative the fraction with numerator negative 4 and denominator 2 center dot 1 end-fraction equals four-halves equals 2 Plug back into the original equation:

x2−9=(x−3)(x+3)x squared minus 9 equals open paren x minus 3 close paren open paren x plus 3 close paren