Question

Find the product using suitable identity:(3xy-5)²

Answer 1

Answer:

9 (xy)^2-30xy+25

Step-by-step explanation:

(3xy-5)^2

(a-b)^2=a^2-2ab+b^2

since,

(3xy-5)^2=(3xy)^2-2×3xy×5+5^2

=9 (xy)^2-30xy+25

Answer 2

Step-by-step explanation:

Solve this by using Distributive property.

(3xy-5) × (3xy-5)

Now , 3xy(3xy-5) - 5(3xy-5)

$9x ^{2} y {}^{2} - 15xy - 15xy + 25$

$9x {}^{2} y {}^{2} + 30xy + 25$