Question

Wer...

Correctly multiply (3x + 7) (7x + 5)
Then find the sum of the coefficients of your solution.

Answer 1

The sum of the coefficients is 85.

Explanation:

(3x + 7)(7x + 5)
3x * 7x is 21x^2
3x*5 is 15x

7 * 7x is 49x

7 * 5 is 35

21x^2 + 15x + 49x + 35

So the answer is 21x^2 + 64x + 35

Add the coefficients: 21 + 64 = 85