0. Review of Algebra

In Exercises 121–128, write each English phrase as an algebraic expression. Then simplify the expression. Let x represent the number. A number decreased by the sum of the number and four

In Exercises 121–128, write each English phrase as an algebraic expression. Then simplify the expression. Let x represent the number. Six times the product of negative five and a number

In Exercises 121–128, write each English phrase as an algebraic expression. Then simplify the expression. Let x represent the number. Eight decreased by three times the sum of a number and six

Perform the indicated operations. Write the resulting polynomial in standard form and indicate its degree. $(-6x^3+7x^2-9x+3)+(14x^3+3x^2-11x-7)$

Find each product : $(3x-2)(4x^2+3x-5)$

Find each product. (7x+4y)(7x-4y)

Find each product. $(a-b)(a^2+ab+b^2)$

In Exercises 59–66, perform the indicated operations. Indicate the degree of the resulting polynomial. (7x⁴y²−5x²y²+3xy)+(−18x⁴y²−6x²y²−xy)

In Exercises 67–82, find each product. (7x² y+1)(2x² y−3)