Ch 6-7.4 Review

Answer explanation

Reminder: A blank index is really an index number of 2.

Which of the following is in exponential form?

Which TWO are equivalent to the above expression?

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Write the above expression in exponential form.

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Find the sum (2x² + 5x - 7) + ( 3 - 4x² + 6x)

• 2x² + 3x +1

• -2x² - 11x -4

• 2x²+ 5x -7

• -2x² + 11x -4

Simplify (4x³ - 5x² + 3x) + (-2x³ - x² + 6x)

• 2x³ - 6x² - 9x

• 2x³ + 6x² + 9x

• -2x³ - 6x² + 9x

• 2x³ - 6x² + 9x

Combine (3x - 4) + (12x + 10)

• x - 12

• 15x + 6

• 36x + 40

• 17x + 9,000

What technique can be use to add polynomials?

• combining like terms
• counting the exponents
• subtracting the coefficients
• multiplying the variables