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3 years ago

Pls answer this for me, this is the remainder theorem for grade 9 so help me.

Mathematics

2 answers:

GrogVix [38]3 years ago

8 0

Answer:

Step-by-step explanation:

1) x + 1 = 0

x = -1

P(x) = x³ + 5x² + 2x + 1

P(-1) = (-1)³ + 5(-1)² + 2*(-1) + 1

= -1 + 5*1 -2 +1

= - 1 +5 - 2 +1

P(-1) = 3

2)x -5 =0

x = 5

P(x) = x³ - 6x² + 5x + 2

P(5) =5³ -6*(5)² + 5*5 + 2

= 125 - 6*25 + 25 + 2

= 125 - 150 + 25 +2

P(5) = 2

professor190 [17]3 years ago

5 0

Answer:

1. 3

2. 2

Step-by-step explanation:

| |

x | + | 1 | | x^2 | + | 4 x | - | 2

x^3 | + | 5 x^2 | + | 2 x | + | 1

x^3 | + | x^2 | | | |

| | 4 x^2 | + | 2 x | |

| | 4 x^2 | + | 4 x | |

| | | | -2 x | + | 1

| | | | -2 x | - | 2

| | | | | | 3

__________________________________________

| |

x | - | 5 | | x^2 | - | x | + | 0

x^3 | - | 6 x^2 | + | 5 x | + | 2

x^3 | - | 5 x^2 | | | |

| | -x^2 | + | 5 x | |

| | | | | | 2

| | | | | | 0

| | | | | | 2

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