Question

Multiply (x+y) and (3x+4y) to each other & verify the product for x=2, y=1


full solution​

Answer 1

Answer:

Step-by-step explanation:

(x + y)(3x + 4y)

3x^2 + 4xy + 3xy + 4y^2

3x^2 + 7xy + 4y^2

3(2)^2 + 7(2)(1) + 4(1)^2

3*4 + 14 + 4

12 + 18

30

Answer 2

Answer:

(x+y)(3x+4y)

3x²+4xy+3xy+4y²

3x²+4y²+7xy

Verification

Putting x = 2 and y=1

(2+1)(3×2+4×1)= 3(2)²+ 4(1)¹+7×2×1

3(6+4)=3×4+4×1+14

3×10=12+4+14

30= 30

Hence, verified.

Hope it helps you!