Question Factor the expression (x−4)(x+4) Evaluate x2−16Rewrite the expression in exponential form x2−42Solution (x−4)(x+4) Show Solution Find the roots x1=−4,x2=4 Evaluate x2−16To find the roots of the expression,set the expression equal to 0 x2−16=0Move the constant to the right-hand side and change its sign x2=0+16Removing 0 doesn't change the value,so remove it from the expression x2=16Take the root of both sides of the equation and remember to use both positive and negative roots x=±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 x=±4Separate the equation into 2 possible cases x=4x=−4Solution x1=−4,x2=4 Show Solution
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