Question

6. Simplify and then verify the result for the given values.
(i) (3x – 4y) (4x+y + 3xy) ; x = 2, y = -1​

Answer 1

Answer:

30

Step-by-step explanation:

i) 3x(4x + y + 3xy) -4y(4x + y + 3xy)

=> 12x²+3xy+9x²y -16xy-4y²-12xy²

=> 12x² - 4y² -12xy² + 9x²y +3xy -16xy

=> 12x² - 4y² -12xy² + 9x²y -13xy

By putting the value

x= 2 , y = 1

12(2²)- 4(1²)- 12(2×(1)²)+ 9(2)²1- 13(2×1)

12(4) -4 -12(2×1) +9(4×1) -26

48 - 4 -24 + 36 -26

44 - 24 + 10

20 + 10

30

Here is your answer dear hope it helps!