Question

How do you evaluate `\frac { - 6+ \sqrt { 6^ { 2} - ( 4) ( 1) ( - 40) } } { 2\cdot 2}`?

Answer 1

2

Explanation:

`[- 6 +sqrt{6^2-(4)(1)(-40)}]/2.2`

=`[- 6+ sqrt {36 + 160}]/4`

= `[ -6 + sqrt 196]/4`

= `[ - 6 +14]/4`

= `8/4`

= 2