if p(x)= x^2-4x+3, evaluate : p(2)-p(-1)+p(-1/2)
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Answer:
Given that,
p(x)=x²-4x+3
we have to replace x by2
p(2)=(2)²-4(2)+3
=4-8+3
=7-8=-1
p(-1)=(-1)²+-4(-1)+3
=1+4+3
=8
p(-1/2)=(-1/2)²-4(-1/2)+3
=1/4+4/2+3
=(1+8+12)/4
=21/4
→p(2)-p(-1)+p(-1/2)
-1-8+21/4
=-4-32+21/4
=21-36/4
=-15/4
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