(a+bx)(c+dx)=income
solve for x
FOIL
ac+adx+bcx+ dbx^2=income
db x^2+ (ad+bc)x+ (ac-income)=0
now, use the quadratic equation to solve for x. Without numerals, it is complicated.
solve for x
ac+adx+bcx+ dbx^2=income
db x^2+ (ad+bc)x+ (ac-income)=0
now, use the quadratic equation to solve for x. Without numerals, it is complicated.