Question Simplify the expression 78b−121 Evaluate 78b−12−109Solution 78b−121 Show Solution Find the roots b=78121Alternative Form b=1.55˙12820˙ Evaluate 78b−12−109To find the roots of the expression,set the expression equal to 0 78b−12−109=0Subtract the numbers 78b−121=0Move the constant to the right-hand side and change its sign 78b=0+121Removing 0 doesn't change the value,so remove it from the expression 78b=121Divide both sides 7878b=78121Solution b=78121Alternative Form b=1.55˙12820˙ Show Solution