## anonymous 3 years ago 2x2 - 5x – 10 = 0 solve using the quadratic formula.

1. anonymous

the formula is $-b \pm \sqrt{b ^{2}-4ac}/2a$

2. anonymous

ur a here is 2; b=-5 and c=10 plug in and solve

3. anonymous

c=-10*

4. anonymous

2x^2-5x-10=0 Quadratic Formula $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$ a=2 b=-5 c=-10 $x=\frac{5\pm\sqrt{25+80}}{4}=\frac{5\pm\sqrt{105}}{4}$

5. anonymous

$2x^2 - 5x - 10 =0$ We know the quadratic formula is of the form... $x = \frac{-b \pm \sqrt{(b^2-4ac)}}{2a}$ Let's try to determine what these variables correspond to in our given equation. $a = 2\\b = -5\\c = -10$ So, now we can plug and solve. $x = \frac{5 \pm \sqrt{(25+80)}}{4}$