document.write( "Question 1045147: When the function y=h(x)=ax^2+bx+c is graphed in the x-y plane, the result is a parabola with vertex at (4,7). If h(2)=0, which of the following must also equal to 0?\r
\n" ); document.write( "\n" ); document.write( "a.)h(5)
\n" ); document.write( "b.) h(6)
\n" ); document.write( "c.) h(8)
\n" ); document.write( "d.) h)9)
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Algebra.Com's Answer #660550 by josgarithmetic(39620)\"\" \"About 
You can put this solution on YOUR website!
You make better sense of this when put h into standard form.\r
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\n" ); document.write( "\n" ); document.write( "\"y=a%28x-h%29%5E2%2Bk\", standard form.\r
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\n" ); document.write( "\n" ); document.write( "\"y=a%28x-4%29%5E2%2B7\" and you have a point, (2,0).
\n" ); document.write( "Think of how a parabola is symmetric.
\n" ); document.write( "Can you judge that \"a%3C0\" ?\r
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\n" ); document.write( "\n" ); document.write( "\"a%28x-h%29%5E2%2B7=y\"
\n" ); document.write( "\"a%28x-h%29%5E2=y-7\"
\n" ); document.write( "\"a=%28y-7%29%2F%28x-h%29%5E2\"
\n" ); document.write( "\"a=%280-7%29%2F%282-4%29%5E2\"
\n" ); document.write( "\"a=-49%2F2\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=-%2849%2F2%29%28x-4%29%5E2%2B7\"
\n" ); document.write( "Find BOTH zeros!
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