## anonymous one year ago Solve each problem by using the quadratic formula. Write solutions in simplest radical form. 2x2 + 2x – 2 = 0

1. pooja195

list abc values

2. pooja195

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

3. pooja195

then plug in

4. netlopes1

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

5. triciaal

factor out 2 first

6. triciaal

sorry if specified using the formula

7. mathmate

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

8. mathmate

*better now than later! :)

9. netlopes1

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

10. netlopes1

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

11. netlopes1

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

12. anonymous

thank you so much! this really helped!

13. netlopes1

ok...

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