Quadratic Equations - Quadratic Formula(L2)

Practice

Solve for x.

a) -5x² +2x+5 = 0
¹/₅ ± ^$\sqrt{26}$/₅

b) -2x² −8x+5 = 0
-2 ± ^$\sqrt{26}$/₂

c) 9x² −7x−3 = 0
⁷/₁₈ ± ^$\sqrt{157}$/₁₈

d) -7x² −2x+1 = 0
^-1/₇ ± ^{2 $\sqrt{2}$}/₇

e) -5x² +5x+1 = 0
¹/₂ ± ^{3 $\sqrt{5}$}/₁₀

f) -1x² +7x+7 = 0
⁷/₂ ± ^$\sqrt{77}$/₂

g) 1x² +7x+9 = 0
^-7/₂ ± ^$\sqrt{13}$/₂

h) 2x² −8x−4 = 0
2 ±

\sqrt{6}

i) 3x² −7x−3 = 0
⁷/₆ ± ^$\sqrt{85}$/₆

j) -1x² +6x+6 = 0
3 ±

\sqrt{15}