How do i solve these using substitution

Graph the linear function using the slooe and y intercept

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

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