Question

Determine o valor numérico de:

a) 3.(x-8),para x = 12
=

b) 3x+x³, para x = 4
=

c) x³-x²-2x, para x = -2

d) 1,5x² + x-3,2, para x = 5

Answer 1

$a)3(12-8)= \\36-24=12\\\\b)3.4+3.4^{3} =\\12+192=204\\\\c)(-2) ^{3} -(-2) ^{2}-2.(-2)=\\ -8-4+4=\\-12+4=-8\\\\d)1,5.5^{2}+5-3,2=\\1,5.25+1,8=\\37,5+1,8=39,3$

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