Question Simplify the expression x2+30x+225 Evaluate (−x−15)2A negative base raised to an even power equals a positive (x+15)2Use (a+b)2=a2+2ab+b2 to expand the expression x2+2x×15+152Solution x2+30x+225 Show Solution Find the roots x=−15 Evaluate (−x−15)2To find the roots of the expression,set the expression equal to 0 (−x−15)2=0The only way a power can be 0 is when the base equals 0 −x−15=0Move the constant to the right-hand side and change its sign −x=0+15Removing 0 doesn't change the value,so remove it from the expression −x=15Solution x=−15 Show Solution
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