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