Question

(Dut Of 40). Calculate the average marks Find the product of (5x + 4y) (3x - 2y)​

Answer 1

Step-by-step explanation:

product of (7x−4y) and (3x−7y)

(7x−4y) (3x−7y)

⇒(7x)(3x)−(7x)(7y)−(4y)(3x)+(4y)(7y)

⇒21x

2

−49xy−12xy+28y

2

⇒21x

2

+28y

2

−61xy