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Mathematics 21 Online
imbadatmath:

Express as a trinomial. (3x+8)(x+6)

mxddi3:

@jhonyy9 @Hoodmemes

Hoodmemes:

huh?

mxddi3:

you're usually good with math

imbadatmath:

he left

Hoodmemes:

ye *she left

imbadatmath:

ohh srry

mxddi3:

ok so do you know what the FOIL method is?

imbadatmath:

yea but i dont remember exactly i heard about it though

mxddi3:

so it's like F: first terms O:outer terms I: inner terms L: last terms. so if we have (3x+8)(x+6) then we need to multiply the first term of each set. this is going to be 3x(x) do you know what that equals?

imbadatmath:

3x²

imbadatmath:

48

mxddi3:

woah mb. what is 3x(6)

imbadatmath:

18x

mxddi3:

yes,and you already did the outer terms which was 48, so now what is 8(x)

imbadatmath:

8x

dolphincove21:

Okay

mxddi3:

so you have \[3x^2 + 18x+ 48+ 8x\] now, combine like terms what do you get?

imbadatmath:

x⁴

mxddi3:

no. okay so the ONLY things in this equation that we can combine is the 18x and 8x. this is because the 3x squared has a square sign but the 18x and 8x do not. do you follow?

imbadatmath:

yes

mxddi3:

so what is 18x+8x

imbadatmath:

26x

mxddi3:

good job. now you are left with \[3x^2 + 26x+48\]

mxddi3:

that's your trinomial

imbadatmath:

thank u

mxddi3:

you're welcome

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