Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) 9x² −7x−5 = 0
⁷/₁₈ ± ^$\sqrt{229}$/₁₈

b) 9x² +x−3 = 0
^-1/₁₈ ± ^$\sqrt{109}$/₁₈

c) 9x² +9x−3 = 0
^-1/₂ ± ^$\sqrt{21}$/₆

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

e) -8x² −9x+5 = 0
^-9/₁₆ ± ^$\sqrt{241}$/₁₆

f) 3x² +3x−4 = 0
^-1/₂ ± ^$\sqrt{57}$/₆

g) -4x² −5x+7 = 0
^-5/₈ ± ^$\sqrt{137}$/₈

h) 6x² +4x−1 = 0
^-1/₃ ± ^$\sqrt{10}$/₆

i) -3x² −6x+4 = 0
-1 ± ^$\sqrt{21}$/₃

j) -6x² −8x+5 = 0
^-2/₃ ± ^$\sqrt{46}$/₆