Question 191719
1)Multiply as indicated.If possible, simplify any radical expressions that appear in the product.
(4 + sqrt of 5)(10-3sqrt of 5) 
{{{(4+sqrt(5))*(10-3sqrt(5))}}}
= {{{40 - 2sqrt(5) -3*5}}}
= {{{25 - 2sqrt(5)}}}
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2)Solve each radical expression.
x=(sqrt of 3x+7)-3 
{{{x+3 = sqrt(3x+7)}}}
{{{x^2 + 6x + 9 = 3x+7}}}
{{{x^2 + 3x + 2 = 0}}}
(x+2)*(x+1) = 0
x = -2
x = -1
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3)Find each product.Write imaginary results in the form a + bi.
(7-2i)(-3+6i) 
= -21 + 12 + 48i
= -9 + 48i