document.write( "Question 572619: f(x)=√(x-3)(2+5x)\r
\n" ); document.write( "\n" ); document.write( "Im not sure how to solve it as well as to finding the domain \n" ); document.write( "

Algebra.Com's Answer #368460 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
f(x)=√(x-3)(2+5x)
\n" ); document.write( "Im not sure how to solve it as well as to finding the domain
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\n" ); document.write( "1st: You cannot \"solve it\".
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\n" ); document.write( "2nd: Domain:
\n" ); document.write( "(x-3)(2+5x) must not be negative:
\n" ); document.write( "Solve (x-3)(2+5x) >= 0
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\n" ); document.write( "The left side is zero when x = -2/5 or when x = 3
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\n" ); document.write( "Draw a number line and plot x = (-2/5) and x = 3
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\n" ); document.write( "Test for solution areas on the number line:
\n" ); document.write( "(x-3)(2+5x) > 0
\n" ); document.write( "If x = -10 ; -*- > 0 ; true, so solution in (-oo,-5/2)
\n" ); document.write( "If x = 0 ; -*+ > 0 ; false
\n" ); document.write( "If x = 10 ; +*+ > 0 ; true, so solutions in (3,+oo)
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\n" ); document.write( "Domain: (-oo,-5/2]U[3,+oo)
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\n" ); document.write( "cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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