Does anyone know of any great and easy ways to understand factoring quadriatic equations and polynomials?

What is the measure of ac? 5 units 13 units 26 units 39 units

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)