1105 ALGEBRA I (PACE)

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JOB 11:18

And thou shalt be secure, because there is hope; yea, thou shalt dig about thee, and thou shalt take thy rest in safety.

SOLVE BY FACTORING. CHECK THE ROOTS. a(a + 5) = 14

a=-7 a=2

SOLVE THE QUADRATIC EQUATION BY FACTORING. CHECK THE ROOTS. c^2 - 5c + 4 = 0

c=4 c=1

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. c^2 - 7c = -12

c=4 c=3

A quadratic equation with the second power of the unknown, but not the first power, is called a/an __________ quadratic equation.

incomplete

A quadratic equation is an equation that has the __________ power, but no higher power of the unknown.

second

Most quadratic equations have __________ roots.

two

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. (x^2/2) + 2x + 3/2 = 0

x=-1 x=-3

SOLVE BY FACTORING. CHECK THE ROOTS. x = (10/x - 3)

x=-2 x=5

STATE THIS WORD PROBLEM AS A QUADRATIC EQUATION. SOLVE AND CHECK. If the square of a positive number is increased by 3 times the number, the result is 54. Find the number.

x=-9 (Incorrect solution, because the number is positive) x=6

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. 5x^2 + 4x - 1 = 0

x=1/5 x=-1

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. x^2 - 8x - 20 = 0

x=10 x=-2

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. x^2 - 3 = 118

x=11 x=-11

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTION. 3√(2x) - 26 = -8

x=18

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. x^2 + 3x - 10 = 0

x=2 x=-5

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTIONS. √x - 3 = 2

x=25

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTIONS. √(x/4) = 8

x=256

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. 4x^2 = 160

x=2√10 x=-2√10

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. x/10 = 6/x

x=2√15 x=-2√15

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. x^2 = 2x + 3

x=3 x=-1

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. 3x^2 - 8x = 3

x=3 x=-1/3

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. 2x^2 - 2 = 16

x=3 x=-3

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. x^2 - x = 3/4

x=3/2 x=-1/2

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. 2x^2 + 3x = 9

x=3/2 x=-3

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTIONS. 2√(4x) - 6 = 18

x=36

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. x^2 - 2x - 8 = 0

x=4 x=-2

SOLVE BY USING THE QUADRATIC FORMULA. CHECK THE ROOTS. 3x^2 + 8 = 14x

x=4 x=2/3

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTION. 3√x = 2

x=4/9

SOLVE THE QUADRATIC EQUATION BY FACTORING. CHECK THE ROOTS. 4/x + 8 = 2x - 6/x

x=5 x=-1

SOLVE BY COMPLETING THE SQUARE. CHECK THE ROOTS. 2x^2 - 9x - 5 = 0

x=5 x=-1/2

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTIONS. 4√(2x-1) = 8

x=5/2

SOLVE THE QUADRATIC EQUATION BY FACTORING. CHECK THE ROOTS. x^2 - 10x = -24

x=6 x=4

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. x/9 = 8/x

x=6√2 x=-6√2

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTION. √(x/5) = 12

x=720

STATE THE WORD PROBLEM AS A QUADRATIC EQUATION. SOLVE AND CHECK. The difference between two positive numbers is 5. Their product is 104. Find the numbers.

x=8 (smaller number) x+5=13 (larger number)

SOLVE THE INCOMPLETE QUADRATIC EQUATION. CHECK THE ROOTS. x^2 - 71 = 10

x=9 x=-9

SOLVE BY FACTORING. CHECK THE ROOTS. 3y^2 - 10y - 8 = 0

y=-2/3 y=4

SOLVE THE RADICAL EQUATION. CHECK YOUR SOLUTION. √(5y - 1) = 7

y=10


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