Question Simplify the expression 16+8r+r2 Evaluate (−4−r)2A negative base raised to an even power equals a positive (4+r)2Use (a+b)2=a2+2ab+b2 to expand the expression 42+2×4r+r2Solution 16+8r+r2 Show Solution Find the roots r=−4 Evaluate (−4−r)2To find the roots of the expression,set the expression equal to 0 (−4−r)2=0The only way a power can be 0 is when the base equals 0 −4−r=0Move the constant to the right-hand side and change its sign −r=0+4Removing 0 doesn't change the value,so remove it from the expression −r=4Solution r=−4 Show Solution
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