Question

x^2+3x-70=0

Answer 1

use the quadratic formula

Answer 2

don't know it?

Answer 3

\[\frac{ -b \pm \sqrt{b^2-4ac} }{ 2a }\]
Is the quadratic formula, and you already have your equation in standard form:
\[ax^2+bx+c\]
So all you need to do is plug in your numbers to get your zeros.

Answer 4

google it. should be quick and easy

Answer 5

ok thanks guy(s)...

Answer 6

Or you can complete the squares

Answer 7

thanks I kind of understand

Answer 8

\[x^2+3x-70=0\]\[x^2+3x=70\]\[x^2+3x+2.25=72.25\]\[(x+1.5)^2=72.25\]\[x+1.5=±8.5\]\[x=-1.5± 8.5\]\[x=7~~~or~~~x=-9\]

Answer 9

Not -9, the second answer is -10