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algebraic devision

Hi Guys,
does anybody see any problem with this algebraic devision? the quotient should come out as x^2 -5x+10 but mine keep coming x^2-5x-10 i don't what part I'm going wrong :frown:

(edited 7 years ago)

Reply 1

pri12321

Original post by Alen.m

Hi Guys,
does anybody see any problem with this algebraic devision? the quotient should come out as x^2 -5x+10 but mine keep coming x^2-5x-10 i don't what part I'm going wrong :frown:

Post the attachment and I'll help :smile:

Reply 2

Alen.m

Original post by TheBride

Post the attachment and I'll help :smile:

i did actually i don't where it's gone

13242163_2033048140252846_1286266828_o.jpg220.7KB

Reply 3

pri12321

Original post by Alen.m

i did actually i don't where it's gone

You've treated the +20 as +20x, I would put an extra term "+0x" in the middle to prevent mix ups :smile:

(See my solution below)

(edited 7 years ago)

Reply 4

LewisClothier

Original post by Alen.m

Hi Guys,
does anybody see any problem with this algebraic devision? the quotient should come out as x^2 -5x+10 but mine keep coming x^2-5x-10 i don't what part I'm going wrong :frown:

The first problem i can see is your spelling of division, thank me later :biggrin:

(edited 7 years ago)

Original post by LewisClothier

The first problem i can see is your spelling of division, thanks me later :biggrin:

I'm kidding, but yeah you need a coefficient of each power of x before trying to divide using long division. (e.g. to divide 3x^4+2x^2+18 by whatever root you find you would need to divide by 3x^4+0x^3+2x^2+0x+18 instead, always remember this step! it'll make a huge difference.