Question

find the missing term in the following perfect squares​ with solution

Answer 1

Answer:

25x²

5²x² - 2.5.9.xy + 9²y²

= 25x² - 90xy + 81y²

Step-by-step explanation:

Use

a²- 2a.b + b²

here,

b² = 81y² = 9²y²

so, 90xy = 2 × a × b = 2× a × 9y = 2× 5x × 9y

so, a = 5x