Mathematics
erika87
2016-09-23 04:44:09
Given the equation below, which of the following shows the quadratic formula correctly applied? x2+5x-8=0
ANSWERS
Irwin762
2016-09-23 04:51:41

This is the concept of quadratic equations, to find out if the expression is correctly applied we solve the equation given using the quadratic formula; x=[-b+-sqrt[b^2-4ac]]/(2a) Given the equation x^2+5x-8=0 then, a=1,b=5 and c=-8 Applying the formula we get: x=[-5+-sqrt(5^2-4*1*(-8))]/(2*1) x=[-5+-sqrt(25+32)]/2 x=[-5+-sqrt57]2 The answer is: x=[-5+-sqrt57]/2

ADD ANSWER