Question Factor the expression (r−2)(r+2) Evaluate r2−4Rewrite the expression in exponential form r2−22Solution (r−2)(r+2) Show Solution Find the roots r1=−2,r2=2 Evaluate r2−4To find the roots of the expression,set the expression equal to 0 r2−4=0Move the constant to the right-hand side and change its sign r2=0+4Removing 0 doesn't change the value,so remove it from the expression r2=4Take the root of both sides of the equation and remember to use both positive and negative roots r=±4Simplify the expression More Steps Evaluate 4Write the number in exponential form with the base of 2 22Reduce the index of the radical and exponent with 2 2 r=±2Separate the equation into 2 possible cases r=2r=−2Solution r1=−2,r2=2 Show Solution
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