shamlisheikha20 shamlisheikha20

09-05-2020
Mathematics

contestada

Pls answer this for me, this is the remainder theorem for grade 9 so help me.
1) x^3 +5x^2+ 2x +1 divided by x+1
2) x^3 - 6x^2 + 5x + 2 divided by x - 5

Respuesta :

marzanmmahee marzanmmahee

09-05-2020

1) Let f(x) be x^3+5x^2+2x+1
Since f(x) is divided by x+1,
R= f(-1) = (-1)^3 + 5(-1)^2+2(-1) + 1
= -1+5-2+1
= 3
2) Let f(x) be x^3 - 6x + 5x +2
Since f(x) is divided by x-5,
R= f(5) = x^3 - 6x^2 + 5x +2
= 5^3 - 6(5)^2 + 5(5) +2
= 125 - 150 + 25 + 2
= 2

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