Question Simplify the expression 7a3−7a Evaluate 7a3−7a×1Solution 7a3−7a Show Solution Factor the expression 7a(a−1)(a+1) Evaluate 7a3−7a×1Evaluate 7a3−7aFactor out 7a from the expression 7a(a2−1)Solution More Steps Evaluate a2−1Rewrite the expression in exponential form a2−12Use a2−b2=(a−b)(a+b) to factor the expression (a−1)(a+1) 7a(a−1)(a+1) Show Solution Find the roots a1=−1,a2=0,a3=1 Evaluate 7a3−7a×1To find the roots of the expression,set the expression equal to 0 7a3−7a×1=0Multiply the terms 7a3−7a=0Factor the expression 7a(a2−1)=0Divide both sides a(a2−1)=0Separate the equation into 2 possible cases a=0a2−1=0Solve the equation More Steps Evaluate a2−1=0Move the constant to the right-hand side and change its sign a2=0+1Removing 0 doesn't change the value,so remove it from the expression a2=1Take the root of both sides of the equation and remember to use both positive and negative roots a=±1Simplify the expression a=±1Separate the equation into 2 possible cases a=1a=−1 a=0a=1a=−1Solution a1=−1,a2=0,a3=1 Show Solution