Question Factor the expression 10(7−8k) Evaluate 70−80kSolution 10(7−8k) Show Solution Find the roots k=87Alternative Form k=0.875 Evaluate 70−80kTo find the roots of the expression,set the expression equal to 0 70−80k=0Move the constant to the right-hand side and change its sign −80k=0−70Removing 0 doesn't change the value,so remove it from the expression −80k=−70Change the signs on both sides of the equation 80k=70Divide both sides 8080k=8070Divide the numbers k=8070Solution k=87Alternative Form k=0.875 Show Solution