Question

12. Simplify 3x(x2 - xy + y2) + 4(3xy-2y?) and find its value for x=-1&y=2​

Answer 1

Answer:

-61

Step-by-step explanation:

3(-1){(-1)²-(-1)(2)+(2)²}+4{(3(-1)(2)-2(2)}

-3(1+2+4)+4(-6-4)

-3(7)+4(-10)

-21-40=-61