Question

There are (4x4- 20x2y2+25y4 ) students to be arranged in a field during assembly of a school. Find the number of rows and columns in which these students can be arranged such that no student is left out.

Answer 1

Answer:

so we have to factorise this term

( 4x^4 -20(xy)^2 + 25y^2)

[(2x^2)^2 +2(2x^2)(-5y^2) + ( -5y^2)^2]

(2x^2 -5y^2)^2

(2x^2 -5y^2)(2x^2 -5y^2) answer