1) 2x² - 6x - 5 = 0 a=2; b= -6; c= -5
2) (x + 7) (x-7) = 3x
x² - 49 -3x = 0
x² - 3x - 49 = 0 a=1; b= -3; c= -49
3) x² - 8x + 16 + 8 = 0
x² - 8x + 24 = 0 a=1; b= -8 c= 24
Equation:
1) [tex] t^{2} = 81[/tex]
[tex] \sqrt{ t^{2} } = \sqrt{81} [/tex]
t = 9
2.) [tex]2 x^{2} = 5
[/tex]
[tex] \frac{2 x^{2} }{2} = \frac{5}{2} [/tex]
[tex] \sqrt{ x^{2} } = \sqrt{ \frac{5}{2} } [/tex]
[tex]x = \frac{5}{2} [/tex]
3) [tex] \sqrt{(x-4) ^{2} } = \sqrt{16} [/tex]
x - 4 = 4
x = 4 + 4
x = 8
4) 3h² = 147
[tex] \frac{3h ^{2} }{3} = \frac{147}{3} [/tex]
h² = 49
[tex] \sqrt{h ^{2} } = \sqrt{49} [/tex]
h = 7
