Calculations
1)
- For this question refer to the figure attached in which both synthetic & long divisions are performed.
- The final answer is gained the same in both ways as
(x−3)3x3−4x2+2x−1=(3x2+5x+17)+(x−3)50
2)
a.=3x2−8x+4−(6x2+7x−1)=3x2−8x+4−6x2−7x+1=−3x2−15x+5
b.=4x7−3x5+2x+4+(12x5−3x+2x2+3)=4x7−3x5+2x+4+12x5−3x+2x2+3=4x7+9x5+2x2−x+7
c.=3x(5x2−2x+3)+4(5x2−2x+3)=15x3−6x2+9x+20x2−8x+12=15x3+14x2+x+12
d.=3+4i+(1−2i)=3+4i+1−2i=4+2i
e.=(2−i)(5−6i)=10−12i−5i+6i2=10−17i−6=4−17i
f.=(3−7i)(1−2i)=3−6i−7i+14(−1)=−11−13i
3)
x2−(−81)x2−81i2(x+9i)(x−9i)x=0=0=0=±9i
4)
37x(37x)37xx=3=33=27=727
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