Question Factor the expression (u−4)(u+4) Evaluate u2−16Rewrite the expression in exponential form u2−42Solution (u−4)(u+4) Show Solution Find the roots u1=−4,u2=4 Evaluate u2−16To find the roots of the expression,set the expression equal to 0 u2−16=0Move the constant to the right-hand side and change its sign u2=0+16Removing 0 doesn't change the value,so remove it from the expression u2=16Take the root of both sides of the equation and remember to use both positive and negative roots u=±16Simplify the expression More Steps Evaluate 16Write the number in exponential form with the base of 4 42Reduce the index of the radical and exponent with 2 4 u=±4Separate the equation into 2 possible cases u=4u=−4Solution u1=−4,u2=4 Show Solution
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