Question
Find the roots
x1=25−65,x2=25+65
Alternative Form
x1≈−1.531129,x2≈6.531129
Evaluate
x2−5x−10
To find the roots of the expression,set the expression equal to 0
x2−5x−10=0
Substitute a=1,b=−5 and c=−10 into the quadratic formula x=2a−b±b2−4ac
x=25±(−5)2−4(−10)
Simplify the expression
More Steps

Evaluate
(−5)2−4(−10)
Multiply the numbers
More Steps

Evaluate
4(−10)
Multiplying or dividing an odd number of negative terms equals a negative
−4×10
Multiply the numbers
−40
(−5)2−(−40)
Rewrite the expression
52−(−40)
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+40
Evaluate the power
25+40
Add the numbers
65
x=25±65
Separate the equation into 2 possible cases
x=25+65x=25−65
Solution
x1=25−65,x2=25+65
Alternative Form
x1≈−1.531129,x2≈6.531129
Show Solution
