Question

Simplify: (4.5p +2.5q)2–(4.5p –2.5q)2 .

Answer 1

Step-by-step explanation:

(2.5p-1.5q)^2 - (1.5p-2.5q)^2:-= 6.25 p^2 + 2.25q^2 -2(2.5p×1.15q) - ( 2.25p^2 + 6.25q^2 - 2 (1.15p×2.25q))=4p^2 - 4q^2=(p^2-q^2)4.