Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

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

b) -6x² −9x+3 = 0
^-3/₄ ± ^$\sqrt{17}$/₄

c) -1x² −2x+5 = 0
-1 ±

\sqrt{6}

d) 3x² −x−9 = 0
¹/₆ ± ^$\sqrt{109}$/₆

e) -5x² −9x−2 = 0
^-9/₁₀ ± ^$\sqrt{41}$/₁₀

f) -9x² +7x+4 = 0
⁷/₁₈ ± ^$\sqrt{193}$/₁₈

g) 3x² +x−7 = 0
^-1/₆ ± ^$\sqrt{85}$/₆

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

i) -8x² −5x+6 = 0
^-5/₁₆ ± ^$\sqrt{217}$/₁₆

j) -1x² +6x+5 = 0
3 ±

\sqrt{14}