Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) -9x² −4x+9 = 0
^-2/₉ ± ^$\sqrt{85}$/₉

b) -9x² −9x+5 = 0
^-1/₂ ± ^$\sqrt{29}$/₆

c) 5x² +7x−4 = 0
^-7/₁₀ ± ^$\sqrt{129}$/₁₀

d) -4x² +2x+9 = 0
¹/₄ ± ^$\sqrt{37}$/₄

e) -2x² +5x+1 = 0
⁵/₄ ± ^$\sqrt{33}$/₄

f) -7x² −8x+6 = 0
^-4/₇ ± ^$\sqrt{58}$/₇

g) 9x² +2x−6 = 0
^-1/₉ ± ^$\sqrt{55}$/₉

h) -1x² +6x−4 = 0
3 ±

\sqrt{5}

i) -3x² −9x+1 = 0
^-3/₂ ± ^$\sqrt{93}$/₆

j) -2x² +4x+2 = 0
1 ±

\sqrt{2}