Answer :
Answer:
Expanding the given expression:
7(x + 3y)^2 - 2x - 6
= 7(x^2 + 6xy + 9y^2) - 2x - 6
= 7x^2 + 42xy + 63y^2 - 2x - 6
= 7x^2 + 42xy - 2x + 63y^2 - 6
= 7x^2 - 2x + 42xy - 6 + 63y^2
Therefore, the solution is:
7x^2 - 2x + 42xy - 6 + 63y^2
Answer:
i can help you dude
Step-by-step explanation:
Firstly, 7(x+3y)²-2x-6
solve the bracket, 7(x+3y) (x+3y)-2x-6
7[(x(x+3y)+3y(x+3y)]-2x-6
7[x²+3xy+3y(x+3y)-2x-6
7(x²+3xy+3xy+9y²)-2x-6
7(x²+6xy+9y²)-2x-6
7x²+42xy+63y²-2x-6
I hope you understand answer thanks!