Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) -5x² −9x+4 = 0
^-9/₁₀ ± ^$\sqrt{161}$/₁₀

b) -1x² −6x+3 = 0
-3 ± 2

\sqrt{3}

c) 8x² −4x−6 = 0
¹/₄ ± ^$\sqrt{13}$/₄

d) 1x² +5x−7 = 0
^-5/₂ ± ^$\sqrt{53}$/₂

e) 5x² −9x−1 = 0
⁹/₁₀ ± ^$\sqrt{101}$/₁₀

f) 7x² +3x−7 = 0
^-3/₁₄ ± ^$\sqrt{205}$/₁₄

g) -3x² −x+8 = 0
^-1/₆ ± ^$\sqrt{97}$/₆

h) 1x² +3x−8 = 0
^-3/₂ ± ^$\sqrt{41}$/₂

i) -3x² +6x+5 = 0
1 ± ^{2 $\sqrt{6}$}/₃

j) -8x² −8x+8 = 0
^-1/₂ ± ^$\sqrt{5}$/₂