Question

Solve each problem by using the quadratic formula. Write solutions in simplest radical form.

2x2 + 2x – 2 = 0

Answer 1

list abc values

Answer 2

\[\huge~x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a } \]

Answer 3

then plug in

Answer 4

\[x=\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a } \rightarrow where \quad a=2 \quad b=2 \quad c=-2\]

Answer 5

factor out 2 first

Answer 6

sorry if specified using the formula

Answer 7

@triciaal I think it's better to factor out even if we use the quad. formula.
Better than later! :)

Answer 8

*better now than later! :)

Answer 9

\[x=\frac{ -2 \pm \sqrt{2^2-4.2(-2)} }{ 2.2 } \rightarrow x=\frac{ -2 \pm \sqrt{4+16} }{ 4 }\]

Answer 10

\[x=\frac{ -2 \pm \sqrt{20} }{ 4 } \rightarrow x=\frac{ -2 \pm 2\sqrt{5} }{ 4 }\]

Answer 11

\[x=\frac{ -1 + \sqrt{5} }{ 2 } \quad or \quad x=\frac{ -1 - \sqrt{5} }{ 2 }\]

Answer 12

thank you so much! this really helped!

Answer 13

ok...