# I'm stuck with this equation, please do help

#### MethMath11

##### Junior Member
i tried the
residual theorem (not sure bout the name, but we call it teorima sisa)

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#### Subhotosh Khan

##### Super Moderator
Staff member
i tried the residual theorem (not sure bout the name, but we call it teorima sisa)
Please show us your work with residual theorem - and show us the result (even if it is wrong/incomplete).

#### HallsofIvy

##### Elite Member
Are you sure it wasn't "f(1)- f(-3)"?

#### MethMath11

##### Junior Member
Please show us your work with residual theorem - and show us the result (even if it is wrong/incomplete).
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?

#### Subhotosh Khan

##### Super Moderator
Staff member
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?
You need to be more careful! How did h(x) turn out to H(x)?

#### Dr.Peterson

##### Elite Member
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?
I think this is HallsofIvy's point: the question can't be answered as it stands, but if 3 had been -3, it could. Give that a try.

It looks like an error in the problem.