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Solve the equation by factoring. 1) x^2 - 25 = 0

Question : Solve the equation by factoring. 1) x^2 - 25 = 0 : 2163411

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Solve the equation by factoring.

1) x2 - 25 = 0

A) 12.5

B) ±5

C) ±6

D) 5

2) 5x2 - 80 = 0

A) 4

B) ±4

C) 8

D) ±20

3) x2 + 7x - 44 = 0

A) -11, 1

B) -11, 4

C) 11, 4

D) 11, -4

4) x2 + 6x = 16

A) 8, -2

B) 8, 2

C) -8, 2

D) -8, 1

5) x2 + 12x = -27

A) 3, 9

B) -27, -1

C) -9, 3

D) -9, -3

6) 6x2 + 11x = 0

A) 0

B) - (11/6)

C) - (11/6), 11

D) - (11/6), 0

7) 20x2 - 4x = 0

A) (1/5)

B) 0

C) (1/5), 0

D) (1/5), 4

8) 12y2 + 25y + 12 = 0

A) (3/4), (4/3)

B) (3/4), - (4/3)

C) - (1/4), - (1/3)

D) - (3/4), - (4/3)

9) x2 - 49 = 48x

A) -1, 49

B) 1, -49

C) -7

D) -7, 7

Use the square root property to solve the quadratic equation.

10) x2 = 225

A) ±15

B) 15

C) 112.5

D) ±16

11) x2 = 14

A) ±√(14)

B) ±196

C) √(14)

D) 7

12) x2 = (1/49)

A) ± (1/7)

B) ± (1/2401)

C) (1/7)

D) ± 7

13) x2 = - 4

A) No real solution

B) ± 16

C) ± 2

D) - 2

14) 2x2 = 3

A) ± (3/2)

B) ± (√(6)/2)

C) (√(3)/2)

D) (√(6)/2)

15) x2 - 6 = 0

A) √(6)

B) No real solution

C) ± 6

D) ± √(6)

16) 5x2 - 35 = 0

A) ± √(7)

B) ± (√(175)/5)

C) √(7)

D) ± (√(35)/5)

17) 5x2 = 16

A) ± (4√(5)/5)

B) ± (√(80)/5)

C) (4√(5)/5)

D) ± (4/5)

18) (x - 4)2 = 49

A) 53

B) 7, -7

C) 11, -3

D) -3, -11

19) (r + 5)2 = 11

A) 6

B) 5 ± √(11)

C) -5 ± √(11)

D) ± √(11)

20) (x + 7)2 = 12

A) ±2√(3)

B) -7 ± 2√(6)

C) 2√(3) ± 7

D) -7 ± 2√(3)

Solution
5 (1 Ratings )

Solved
Mathematics 2 Years Ago 164 Views
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