Question

Calcule:
a) x² -5x +10, para x = 2

b)3x² +4x -1, para x = 0,5

c)x² + 3x + 1, para x = 0,1

d) 2x³ -x² -x +2, para x = -1

Answer 1

$a) ~~x^2 -5x +10, ~~para\to x = 2\\\\\\ 2^2 -5.2 +10\to \\\\ 4-10+10\to\\\\ \large\boxed{4}$



$b)~~3x^2+4x -1, ~~para \tox = 0,5\\\\ 3.(0,5)^2+4.(0,5) -1\to\\\\ 3.0,25+2-1\to\\\\ 0,75+2-1\to\\\\ 2,75-1\to\\\\ \large\boxed{1,75}$




$c)~~x^2 + 3x + 1, ~~para\to x = 0,1\\\\\\ (0,1)^2 + 3(0,1) + 1\to\\\\ 0,01+0,3+1\to\\\\ \large\boxed{1,31}$




$d) ~~2x^3 -x^2 -x +2,~~ para\to x = -1\\\\\\ 2(-1)^3 -(-1)^2 -(-1) +2\to\\\\ 2.(-1)-(+1)+1+2\to\\\\ -2-1+1+2\to\\\\ -3+3\to\\\\ \large\boxed{0}$

Answer 2

a) 4-20+10= -6
b) 3.0,25+ 1,5-1= 1,25
c) 0,01+0,3+1= 1,31
d) 2.(-1) - 1+1 +2= 0