Question Simplify the expression 70−4a Evaluate 100−4a−30Solution 70−4a Show Solution Factor the expression 2(35−2a) Evaluate 100−4a−30Subtract the numbers 70−4aSolution 2(35−2a) Show Solution Find the roots a=235Alternative Form a=17.5 Evaluate 100−4a−30To find the roots of the expression,set the expression equal to 0 100−4a−30=0Subtract the numbers 70−4a=0Move the constant to the right-hand side and change its sign −4a=0−70Removing 0 doesn't change the value,so remove it from the expression −4a=−70Change the signs on both sides of the equation 4a=70Divide both sides 44a=470Divide the numbers a=470Solution a=235Alternative Form a=17.5 Show Solution