How do you simplify #(2+ \sqrt { - 25} ) + ( - 8- \sqrt { - 9} )#?
2 Answers
Jul 25, 2018
Explanation:
Jul 25, 2018
Explanation:
#"note that "sqrt(-1)=i#
#•color(white)(x)sqrtaxxsqrtbhArrsqrt(ab)#
#sqrt(-25)=sqrt(25xx-1)=sqrt25xxsqrt(-1)=5i#
#sqrt(-9)=sqrt(9xx-1)=sqrt9xxsqrt(-1)=3i#
#2+sqrt(-25)-8-sqrt(-9)#
#=2+5i-8-3i#
#=(2-8)+(5i-3i)#
#=-6+2i#