Question

(3x + 7y)^2 find the product​

Answer 1

Step-by-step explanation:

3 (4x + 5y) - 2 (3x - 7y) =

3 (4x) + 3 (5y) - 2 (3x) -2 (-7y) =

12x + 15y - 6x + 14y =

6x + 29y

Let x = 3, y = -2:

6(3) + 29(-2) = 18 - 58 = -40

Answer 2

Step-by-step explanation:

$\sf\bold{3}\pink{(4x + 5y)} - \bold{2}\pink{(3x - 7y) </p><p>}$

$\bold{3}\pink{(4x)}+ \bold{3}\pink{(5y)} - \bold{2}\pink{(3x)} - \bold{2}\pink{(-7y)}$

$\sf\bold{12x + 15y - 6x + 14y}$

$\bold\red{6x + 29y}$

$\sf Let \: x = \red{3} , y =\red{ - 2} :$

$\sf 6(3) + 29(- 2)$

$\sf = 18 - 58$

$\fbox{ = - 40}$