Learn how to solve special products problems step by step online. Expand the expression (3y^7-7x)(9y^14+42y^7x49x^2). Multiply the single term 9y^{14}+42y^7x+49x^2 by each term of the polynomial \left(3y^7-7x\right). Multiply the single term 3y^7 by each term of the polynomial \left(9y^{14}+42y^7x+49x^2\right). When multiplying exponents with same base we can add the exponents. When multiplying two powers that have the same base (y^7), you can add the exponents.

Expand the expression (3y^7-7x)(9y^14+42y^7x49x^2)