I need the answer as well. Thanks.
-
Start with (7x +2)*(7x+2).
Multiply the 7X by (7X+2) to get 49X^2+14X
Then multiply 2 by (7X+2) to get 14X+4
Put those expressions together to get 49X^2+14X+14X+4 which is 49X^2+28X+4
Then go to -3(X+2). Multiply the -3 by each to get -3X-6
Now multiply -5X*(-3X-6), which is 15X^2+30X
Put this expression together with the one at the top so you have 49X^2+28X+4+15X^2+30X. Simplify that by adding the like expressions. 64X^2+58X+4 is your answer
Multiply the 7X by (7X+2) to get 49X^2+14X
Then multiply 2 by (7X+2) to get 14X+4
Put those expressions together to get 49X^2+14X+14X+4 which is 49X^2+28X+4
Then go to -3(X+2). Multiply the -3 by each to get -3X-6
Now multiply -5X*(-3X-6), which is 15X^2+30X
Put this expression together with the one at the top so you have 49X^2+28X+4+15X^2+30X. Simplify that by adding the like expressions. 64X^2+58X+4 is your answer
-
(7x + 2)^2 - 5x(-3(x + 2))
49x^2 + 28x + 4 - 5x(-3(x + 2))
49x^2 + 28x + 4 - 5x(-3x - 6)
49x^2 + 28x + 4 + 15x^2 + 30x
64x^2 + 58x + 4 <===ANSWER
49x^2 + 28x + 4 - 5x(-3(x + 2))
49x^2 + 28x + 4 - 5x(-3x - 6)
49x^2 + 28x + 4 + 15x^2 + 30x
64x^2 + 58x + 4 <===ANSWER
-
You can't solve that since it's not an equation, but you can simplify it as it was done above.