Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) 9x² −x−2 = 0
¹/₁₈ ± ^$\sqrt{73}$/₁₈

b) -1x² +6x−7 = 0
3 ±

\sqrt{2}

c) -5x² +3x+3 = 0
³/₁₀ ± ^$\sqrt{69}$/₁₀

d) -9x² +6x+1 = 0
¹/₃ ± ^$\sqrt{2}$/₃

e) -6x² +x+4 = 0
¹/₁₂ ± ^$\sqrt{97}$/₁₂

f) 7x² +8x−9 = 0
^-4/₇ ± ^$\sqrt{79}$/₇

g) 2x² −5x−1 = 0
⁵/₄ ± ^$\sqrt{33}$/₄

h) -2x² −9x−8 = 0
^-9/₄ ± ^$\sqrt{17}$/₄

i) 7x² +6x+1 = 0
^-3/₇ ± ^$\sqrt{2}$/₇

j) 4x² +9x−4 = 0
^-9/₈ ± ^$\sqrt{145}$/₈