Question Factor the expression (l−2)(l+2) Evaluate l2−4Rewrite the expression in exponential form l2−22Solution (l−2)(l+2) Show Solution Find the roots l1=−2,l2=2 Evaluate l2−4To find the roots of the expression,set the expression equal to 0 l2−4=0Move the constant to the right-hand side and change its sign l2=0+4Removing 0 doesn't change the value,so remove it from the expression l2=4Take the root of both sides of the equation and remember to use both positive and negative roots l=±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 l=±2Separate the equation into 2 possible cases l=2l=−2Solution l1=−2,l2=2 Show Solution
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