Question

find the product of (2x2-4x+5y2+3) and (5y2-2y2)​

Answer 1

(a – b) × (c + d) = a × (c + d) – b × (c + d) = (a × c + a × d) – (b × c + b × d) = ac + ad – bc – bd Let, a= 2x2, b= 5y2, c= x2, d= 3y2 Now, = 2x2 × (x2 + 3y2) – 5y2 × (x2 + 3y2) = [(2x2 × x2) + (2x2 × 3y2)] – [(5y2 × x2) + (5y2 × 3y2)] = [2x4 + 6x2y2 – 5y2x2 – 15y4] = [2x4 + x2y2 – 15y4]Read more on Sarthaks.com - https://www.sarthaks.com/749124/find-the-product-2x-2-5y-2-x-2-3y-2