–15b + 2b − –7b = –12

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Find the zeros of each function. f(x) = 6x^2 - 7x - 20

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 4x^2 - 19x- 5