Question Simplify the expression x2−9 Evaluate (x+3)(x−3)Use (a+b)(a−b)=a2−b2 to simplify the product x2−32Solution x2−9 Show Solution Find the roots x1=−3,x2=3 Evaluate (x+3)(x−3)To find the roots of the expression,set the expression equal to 0 (x+3)(x−3)=0Separate the equation into 2 possible cases x+3=0x−3=0Solve the equation More Steps Evaluate x+3=0Move the constant to the right-hand side and change its sign x=0−3Removing 0 doesn't change the value,so remove it from the expression x=−3 x=−3x−3=0Solve the equation More Steps Evaluate x−3=0Move the constant to the right-hand side and change its sign x=0+3Removing 0 doesn't change the value,so remove it from the expression x=3 x=−3x=3Solution x1=−3,x2=3 Show Solution
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