Algebra
Calculus
Trigonometry
Matrix
Question
Find the roots
r1=−2,r2=2
Alternative Form
r1≈−1.414214,r2≈1.414214
Evaluate
r2−2
To find the roots of the expression,set the expression equal to 0
r2−2=0
Move the constant to the right-hand side and change its sign
r2=0+2
Removing 0 doesn't change the value,so remove it from the expression
r2=2
Take the root of both sides of the equation and remember to use both positive and negative roots
r=±2
Separate the equation into 2 possible cases
r=2r=−2
Solution
r1=−2,r2=2
Alternative Form
r1≈−1.414214,r2≈1.414214
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