My dumb self forgot to put a picture on the last one but please help me with these 4 questions in the picture, my friend and I have about 3 of the answers but need help checking our work. I’ll give you brainliest and I made it 100 points.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

How do i put 3(x+7) in distributive property

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no