document.write( "Question 346275: If a = 9c^2 + 4 and b = 7 + 3c, what is a in terms of b? Step by step please with formula used to solve. \n" ); document.write( "
Algebra.Com's Answer #247635 by ewatrrr(24785)\"\" \"About 
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Hi,
\n" ); document.write( "Note: First solve for c:
\n" ); document.write( "b = 7 + 3c
\n" ); document.write( "\"c+=+%28b-7%29%2F3\"
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\n" ); document.write( "\"a+=+9c%5E2+%2B+4\"
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\n" ); document.write( "Substitute for c:
\n" ); document.write( "\"a+=+9%2A%28%28b-7%29%2F3%29%5E2+%2B+4\"
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\n" ); document.write( "a = 9(b-7)^2)/9 + 4
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\n" ); document.write( "\"a+=+%28b-7%29%5E2+%2B+4\"
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\n" ); document.write( "\"a+=+%28b-7%29%28b-7%29+%2B+4\"
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\n" ); document.write( "\"a+=+b%5E2-14%2Ab+%2B+49%2B+4\"
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\n" ); document.write( "\"a+=+b%5E2-14%2Ab+%2B+53\"
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