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What's m2-5m-14=0 solved using the quadratic formula?


Sagot :

the answers are x=7 or x=-2 

[tex]x=-b[/tex]+[tex] \sqrt{b ^{2} -4ac} [/tex]/2
x=5 + [tex] \sqrt{(-5) ^){2}-4(1)(-14 } [/tex]/2
x=5 +[tex] \sqrt{25+56} [/tex]/2
x=5 +[tex] \sqrt{81} [/tex]/2
x=5 +[tex] \sqrt{81} [/tex]/2.....x=7
or
x=5 - [tex] \sqrt{81} [/tex]/2....x=-2