Question Factor the expression 321(a−640) Evaluate 321a−20Solution 321(a−640) Show Solution Find the roots a=640 Evaluate 321a−20To find the roots of the expression,set the expression equal to 0 321a−20=0Move the constant to the right-hand side and change its sign 321a=0+20Removing 0 doesn't change the value,so remove it from the expression 321a=20Multiply by the reciprocal 321a×32=20×32Multiply a=20×32Solution a=640 Show Solution
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