lol.. now thats more clear..
1. 3t² = 12
t² = 12/3
√t² = √4
t = 2
2. [tex] x^{2} =150[/tex]
[tex] \sqrt{ x^{2} }= \sqrt{150} [/tex]
[tex]x=5 \sqrt{6} [/tex]
3. [tex] x^{2} = \frac{9}{16} [/tex]
[tex] \sqrt{ x^{2} } = \sqrt{ \frac{9}{16} } [/tex]
[tex]x= \frac{3}{4} [/tex]
4. (s-4)² - 81 = 0
s² - 4s + 16 - 81 = 0
s² - 4s - 65 = 0
[tex]s=2+ \sqrt{69} [/tex] and [tex]s=2- \sqrt{69} [/tex]
5. 3h² - 147 = 0
h² = 147/3
[tex]h^{2} = \sqrt{49} [/tex]
[tex]h=7[/tex]