Question Factor the expression (y−7)(y+7) Evaluate y2−49Rewrite the expression in exponential form y2−72Solution (y−7)(y+7) Show Solution Find the roots y1=−7,y2=7 Evaluate y2−49To find the roots of the expression,set the expression equal to 0 y2−49=0Move the constant to the right-hand side and change its sign y2=0+49Removing 0 doesn't change the value,so remove it from the expression y2=49Take the root of both sides of the equation and remember to use both positive and negative roots y=±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 y=±7Separate the equation into 2 possible cases y=7y=−7Solution y1=−7,y2=7 Show Solution
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