Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) -9x² −7x+9 = 0
^-7/₁₈ ± ^$\sqrt{373}$/₁₈

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

c) -9x² −4x+2 = 0
^-2/₉ ± ^$\sqrt{22}$/₉

d) -5x² +6x+2 = 0
³/₅ ± ^$\sqrt{19}$/₅

e) 9x² −5x−5 = 0
⁵/₁₈ ± ^$\sqrt{205}$/₁₈

f) -4x² +2x+1 = 0
¹/₄ ± ^$\sqrt{5}$/₄

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

h) -7x² +9x+6 = 0
⁹/₁₄ ± ^$\sqrt{249}$/₁₄

i) 3x² −5x−7 = 0
⁵/₆ ± ^$\sqrt{109}$/₆

j) 1x² +6x−8 = 0
-3 ±

\sqrt{17}