Question 897082
Tutor please help me simplify {{{ -sqrt( 125 )+3sqrt( 45 ) }}}. I have gotten {{{ -5sqrt( 5 )+3(3sqrt( 5)) }}} and think it is wrong.
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{{{- 5sqrt(5) + 3(3sqrt(5))}}} is correct, but since 3(3) = 9, this becomes: {{{- 5sqrt(5) + 9sqrt(5)}}}, which when combined results in:
{{{highlight_green(4sqrt(5))}}} (lowest radical form)