Adding and Subtracting Polynomials — Unit test Answers
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Leonora is factoring a trinomial. The factors of the trinomial are shown on the model.
A
x2 + 4x – 12B
x2 + 2x – 6C
x2 – 8x – 6D
x2 – 4x – 1222
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What is the greatest common factor of 8x and 40y?
A
8B
8xyC
320D
320xy23
The expression 40x2 – 65x + 50 represents the sum of the interior angles of a regular pentagon in degrees. If the interior angles of the pentagon are equal, which expression represents the measure of two angles?
A
2x2(20 – 32x + 25x2)B
2(8x2 – 13x +10)C
5x2(8x2 – 13x + 10)D
5(3x2 – 8x + 5)24
A square with an area of A2 is enlarged to a square with an area of 25A2. How was the side of the smaller square changed?
A
The side length was increased by 5.B
The side length was multiplied by 5.C
The side length was increased by 10.D
The side length was multiplied by 10.25
How could Brent use a rectangle to model the factors of x2 – 7x + 6?
A
He could draw a diagram of a rectangle with dimensions x – 3 and x – 4 and then show the area is equivalent to the sum of x2, –3x, –4x, and half of 12.B
He could draw a diagram of a rectangle with dimensions x + 7 and x – 1 and then show the area is equivalent to the sum of x2, 7x, –x, and 6.C
He could draw a diagram of a rectangle with dimensions x – 1 and x – 6 and then show the area is equivalent to the sum of x2, –x, –6x, and 6.D
He could draw a diagram of a rectangle with dimensions x – 4 and x + 3 and then show the area is equivalent to the sum of x2, –4x, 3x, and half of –12.Did you find these answers helpful?
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