We know that the scientific notation is a representation of a very large or a very small number in the product of a decimal form of number (commonly between 1 and 10) and powers of ten.
Given : There are red blood cells contained in 50 cubic millimeters of blood .
The representation of 50 cubic millimeters in scientific notation is given by :-
X² - 8x - 20 factors to give option B) (x - 10)(x + 2) x² + 8x - 20 factors to give option A) (x - 2)(x + 10) x² - x - 20 factors to give option C) (x - 5)(x + 4) and x² - 9x - 20 is option D) Prime.