Question Simplify the expression Solution x2−49 Evaluate (x+7)(x−7)Use (a+b)(a−b)=a2−b2 to simplify the product x2−72Solution x2−49 Show Solution Find the roots Find the roots of the algebra expression x1=−7,x2=7 Evaluate (x+7)(x−7)To find the roots of the expression,set the expression equal to 0 (x+7)(x−7)=0Separate the equation into 2 possible cases x+7=0x−7=0Solve the equation More Steps Evaluate x+7=0Move the constant to the right-hand side and change its sign x=0−7Removing 0 doesn't change the value,so remove it from the expression x=−7 x=−7x−7=0Solve the equation More Steps Evaluate x−7=0Move the constant to the right-hand side and change its sign x=0+7Removing 0 doesn't change the value,so remove it from the expression x=7 x=−7x=7Solution x1=−7,x2=7 Show Solution