Compute (x + 3)(x - 4).

Select one:

A.x²+ 7x - 12

B.x²+ 7x + 12

C.x²+ x - 12

D.x²- x - 12

Question12

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Compute (x²+ 4)(x²- 4).

Select one:

A.x⁴+ 16

B.x⁴- 16

C.x⁴+ 8x²- 16

D.x⁴- 8x²+ 16

Question13

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Compute [(1/4)x + 4][(3/4)x - 1].

Select one:

A.(3/4)x²+ x + 4

B.(3/16)x²- x + 4

C.(3/16)x²+ (11/4)x - 4

D.x²+ x - 4

Question14

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Compute (5x + 4)².

Select one:

A.25x²+ 16

B.10x²+ 20x + 16

C.10x²+ 40x + 16

D.25x²+ 40x + 16

Question15

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Compute (x - 2)²(x + 2)².

Select one:

A.x⁴-16x²- 16

B.x⁴-8x²+ 16

C.x⁴-16x²- 32

D.x⁴-4x²+ 16

Question16

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Multiply.(-8x⁹)(-3x²).

Select one:

a.24x¹⁸

b.-24x¹⁸

c.24x¹¹

d.-24x¹¹

Question17

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Multiply. (4x⁵)(-9x⁴)

Select one:

a.-36x²⁰

b.36x²⁰

c.-36x⁹

d.36x⁹

Question18

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Compute. (5x⁶+ 9x⁵- 3) + (7x⁶+ 9x⁵+ 4)

Select one:

a.31x¹¹

b.12 + 18x⁶+ 1x⁵

c.4x⁶+ 14x⁵+ 13

d.12x⁶+ 18x⁵+ 1