Question Factor the expression (a−7)(a+7) Evaluate a2−49Rewrite the expression in exponential form a2−72Solution (a−7)(a+7) Show Solution Find the roots a1=−7,a2=7 Evaluate a2−49To find the roots of the expression,set the expression equal to 0 a2−49=0Move the constant to the right-hand side and change its sign a2=0+49Removing 0 doesn't change the value,so remove it from the expression a2=49Take the root of both sides of the equation and remember to use both positive and negative roots a=±49Simplify the expression More Steps Evaluate 49Write the number in exponential form with the base of 7 72Reduce the index of the radical and exponent with 2 7 a=±7Separate the equation into 2 possible cases a=7a=−7Solution a1=−7,a2=7 Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix