The product of two consecutive whole numbers is 90. what are the two consecutive whole numbers

For this, you could use factoring or the quadratic formula, but I will answer this using factoring.

x (x+1) = 90

x^2 + x = 90

Subtract 90 from both sides = x^2 + x - 90=0

Factor the left side (x-9) (x+10) = 0

Therefore the two whole numbers are 9 and 10.