Question Factor the expression 21(6+b) Evaluate 3+21bSolution 21(6+b) Show Solution Find the roots b=−6 Evaluate 3+21bTo find the roots of the expression,set the expression equal to 0 3+21b=0Move the constant to the right-hand side and change its sign 21b=0−3Removing 0 doesn't change the value,so remove it from the expression 21b=−3Multiply by the reciprocal 21b×2=−3×2Multiply b=−3×2Solution b=−6 Show Solution
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