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8.06 Practice

8.06 Practice

Assessment

Presentation

Mathematics

9th Grade

Hard

Created by

Sopheak Sam

Used 9+ times

FREE Resource

10 Slides • 7 Questions

1

8.06 Practice

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2

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3

Multiple Choice

What is the factored form of  4x2+4x+1=04x^2+4x+1=0  ?

1

 (2x+1)(2x+1)=0\left(2x+1\right)\left(2x+1\right)=0  

2

 (2x1)(2x+1)\left(2x-1\right)\left(2x+1\right)  

3

 (2x1)(2x1)\left(2x-1\right)\left(2x-1\right)  

4

 (4x+1)(1x+1)\left(4x+1\right)\left(1x+1\right)  

4


 4x2+4x+1=04x^2+4x+1=0  

  •  x2+4x+4=0x^2+4x+4=0  Multiply 4 and 1

  • Options: 1x4 and 2x2

  •  (x+2)(x+2)=0\left(x+2\right)\left(x+2\right)=0  

  •  (x+24)(x+24)=0\left(x+\frac{2}{4}\right)\left(x+\frac{2}{4}\right)=0  divide by 4

  •  (2x+1)(2x+1)=0\left(2x+1\right)\left(2x+1\right)=0  

5

Multiple Choice

What is the solution for  4x2+4x+1=04x^2+4x+1=0  ?

1

 x=12or x=12x=\frac{1}{2}or\ x=-\frac{1}{2}  

2

 x=12and x=12x=-\frac{1}{2}and\ x=-\frac{1}{2}  

3

 x=12 and x=12x=\frac{1}{2\ }and\ x=\frac{1}{2}  

4

 x=14or x=1x=\frac{1}{4}or\ x=1  

6

 (2x+1)(2x+1)=0\left(2x+1\right)\left(2x+1\right)=0  

  •  2x+1=02x+1=0  

  •  2x=12x=-1  

  •  x=12x=-\frac{1}{2}  

  • one solution

7

Multiple Choice

Solve:  2x2x15=02x^2-x-15=0  

1

 x=52x=-\frac{5}{2}  and  x=3x=3  

2

 x=52x=\frac{5}{2}  and  x=3x=-3  

3

 x=52x=\frac{5}{2}  and  x=3x=3  

4

 x=52x=-\frac{5}{2}  and  x=3x=-3  

8

 2x2x15=02x^2-x-15=0  

  •  x2x30=0x^2-x-30=0  multiply 2 and -15

  • options: 1x30, 2x15, 3x10, and 5x6

  •  (x6)(x+5)=0\left(x-6\right)\left(x+5\right)=0  divide by 2

  •  (x62)(x+52)=0\left(x-\frac{6}{2}\right)\left(x+\frac{5}{2}\right)=0  

  •  (x3)(2x+5)=0\left(x-3\right)\left(2x+5\right)=0  

  •  x3=0x-3=0  and  2x+5=02x+5=0  

  •  x=3x=3  and  x=52x=-\frac{5}{2}  

9

Multiple Choice

Solve:  3x2+7x6=03x^2+7x-6=0 

1

 x = 3x\ =\ 3  and  x=23x=-\frac{2}{3}  

2

 x=3x=-3  and  x=23x=-\frac{2}{3}  

3

 x=3x=-3  and  x=23x=\frac{2}{3}  

4

 x=3x=3  and  x=23x=\frac{2}{3}  

10


 3x2+7x6=03x^2+7x-6=0  

  •  x2+7x18=0x^2+7x-18=0  multiply 3 and -6

  • Options: 1x18, 2x9, 3x6

  •  (x+9)(x2)=0\left(x+9\right)\left(x-2\right)=0  

  •  (x+93)(x23)=0\left(x+\frac{9}{3}\right)\left(x-\frac{2}{3}\right)=0  divide by 3

  •  (x+3)(3x2)=0\left(x+3\right)\left(3x-2\right)=0  

  •  x+3=0x+3=0  and  3x2=03x-2=0  

  • x=-3 and x=2/3

11

Multiple Choice

Solve by factoring: 2x2+ 7x + 6 = 0

1

x= 3/2 and x = 2

2

x = -3/2 and x = -2

3

x = 6 and x = 7

4

x = -6 and x = -7

12


 2x2+7x+6=02x^2+7x+6=0  

  •  x2+7x+12=0x^2+7x+12=0  multiply 2 and 6

  • Options: 1x12, 2x6, 3x4

  •  (x+3)(x+4)=0\left(x+3\right)\left(x+4\right)=0  

  •  (x+32)(x+42)=0\left(x+\frac{3}{2}\right)\left(x+\frac{4}{2}\right)=0  

  •  (2x+3)(x+2)=0\left(2x+3\right)\left(x+2\right)=0  

  •  2x+3=02x+3=0  and  x+2=0x+2=0  

  •  x=32x=-\frac{3}{2}  and  x=2x=-2  

13

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14

Multiple Choice

Solve 6x2-4 = -5x

1

x = 1/2, x = 4/3

2

x = -4/3, x = 1/2

3

x = 8, x = -3

4

x = -8, x = 3

15


 6x24=5x6x^2-4=-5x  

  •  6x2+5x4=06x^2+5x-4=0  

  •  x2+5x24=0x^2+5x-24=0  multiply 6 and -4

  • Options: 1x24, 2x12, 3x8, 4x6

  •  (x+86)(x36)=0\left(x+\frac{8}{6}\right)\left(x-\frac{3}{6}\right)=0  

  •  3x+4=03x+4=0  and  2x1=02x-1=0  

  •  3x=43x=-4  and  2x=12x=1  

  •  x=43x=-\frac{4}{3}  and  x=12x=\frac{1}{2}  

16

Multiple Choice

Solve:

 5x2+7x=x2+25x^2+7x=x^2+2  

1

x=-2 and 1/4

2

x=2 and 1/4

3

x=-2 and -1/4

4

x=8 and -1

17


 5x2+7x=x2+25x^2+7x=x^2+2  

  •  4x2+7x2=04x^2+7x-2=0  set equal to 0

  •  x2+7x8=0x^2+7x-8=0  multiply 4 and -2

  •  (x+84)(x14)=0\left(x+\frac{8}{4}\right)\left(x-\frac{1}{4}\right)=0  divide by 4

  •  (x+2)(4x1)=0\left(x+2\right)\left(4x-1\right)=0  

  •  x+2=0x+2=0  and  4x1=04x-1=0  

  • x=-2 and x=1/4

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