F(x)=-x^2+8x-14 using quadratic formula

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Ineed with number 6 , explain how to get 1978