#2
[tex]\\ \sf\longmapsto \pm\sqrt{1.96}[/tex]
[tex]\\ \sf\longmapsto \pm\sqrt{\dfrac{196}{100}}[/tex]
[tex]\\ \sf\longmapsto \pm{\dfrac{14}{10}}[/tex]
[tex]\\ \sf\longmapsto \pm 1.4[/tex]
#4
[tex]\\ \sf\longmapsto \sqrt{-441}[/tex]
[tex]\\ \sf\longmapsto \sqrt{441}i [/tex]
[tex]\\ \sf\longmapsto 21i[/tex]
Answer:
2. -1.4
3. 21i
Step-by-step explanation:
Question 2 Steps:
(-[tex]+-\sqrt{1.96}[/tex])
Remove parenthesis: (-a) = -a
= - [tex]\sqrt{ 1.96[/tex]
[tex]\sqrt{1.96}[/tex] = 1.4
= -1.4
Question 4 Steps:
[tex]\sqrt{-441}[/tex]
Apply radical rule: [tex]\sqrt{-a}[/tex] = [tex]\sqrt{-1} \sqrt{a}[/tex]
[tex]\sqrt{-441}[/tex] = [tex]\sqrt{-1} \sqrt{441}[/tex]
= [tex]\sqrt{-1} \sqrt{441}[/tex]
Apply imaginary number rule: [tex]\sqrt{-1}[/tex] = i
[tex]\sqrt{441}[/tex] =21
= 21i
I hope this helps you in any shape or form.
