Divided a polynomial by a linear algebra by synthetic division.
f(x)=2x³-3x²+9x-10
g(x)=x-2
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In the figure ABCD,
\angle A=50\∠A=50 \angle B=130∠B=130 \angle C=\ 120∠C= 120 \angle D=\ x∠D= x
Since, the sum of all angles of a quadrilateral is 360 degrees,
Therefore, \angle A\ +\ \angle B\ +\ \angle C\ +\ \angle D=360∠A + ∠B + ∠C + ∠D=360
50 + 130 + 120 + x= 360
= 300 + x= 360
=x= 360 - 300
x=60 degrees.
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