Question
Find the roots
x1=25−41,x2=25+41
Alternative Form
x1≈−0.701562,x2≈5.701562
Evaluate
x2−5x−4
To find the roots of the expression,set the expression equal to 0
x2−5x−4=0
Substitute a=1,b=−5 and c=−4 into the quadratic formula x=2a−b±b2−4ac
x=25±(−5)2−4(−4)
Simplify the expression
More Steps

Evaluate
(−5)2−4(−4)
Multiply the numbers
More Steps

Evaluate
4(−4)
Multiplying or dividing an odd number of negative terms equals a negative
−4×4
Multiply the numbers
−16
(−5)2−(−16)
Rewrite the expression
52−(−16)
If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses
52+16
Evaluate the power
25+16
Add the numbers
41
x=25±41
Separate the equation into 2 possible cases
x=25+41x=25−41
Solution
x1=25−41,x2=25+41
Alternative Form
x1≈−0.701562,x2≈5.701562
Show Solution
